Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
91results about How to "Suppression of vortex induced vibration" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling
InactiveCN102071883ASuppression of vortex induced vibrationExpand the scope of useDrilling rodsFluid dynamicsStructural deformationGravitation
The invention discloses an underwater stand pipe vortex induced vibration inhibiter adopting a rotatable cowling, belonging to the technical field of ocean stand pipe facility laying. In the invention, the rotatable cowling capable of changing own direction along with the current flow direction is installed on an underwater stand pipe and comprises a pair of rotating modules, a cowling fixing pad and a cowling. The inhibiter is characterized in that the front part of the cowling is round, the rear part of the cowling is pointed, the surface of the cowling is smooth, and the shape of the cowling is similar to a water drop. The circular arc part of the cowling is coaxial to the stand pipe and is connected with a main pipe by the rotating module which is convenient to install and disassemble to cause the circular arc part to freely rotate around the stand pipe. A small-density buoyant material is added in the hollow part of the cowling, and the structural deformation and pivoting friction resistance brought by the asymmetric gravity of the cowling can be eliminated. Because of effectively inhibiting vortex induced vibration, the underwater stand pipe vortex induced vibration inhibiter can improve the fatigue resistance of the underwater stand pipe, thus greatly lowering the engineering cost. Meanwhile, the inhibiter overcomes limitation on incoming flow directions by various vortex induced vibration inhibiters, and has high application value in the environments with frequently changed flow directions of oceans, rivers and the like.
Owner:SHANGHAI JIAO TONG UNIV
Method for preventing buckle propagation and inhibiting vortex-induced vibration of benthal pipeline
InactiveCN101696751AAvoid spreadingIntegrity guaranteedPipe laying and repairPipe elementsOcean bottomEngineering
The invention belongs to the technical field of paving benthal pipeline facility and relates to a method for preventing buckle propagation and inhibiting vortex-induced vibration of a benthal pipeline. According to the dimensions of an outside diameter and the wall thickness of the benthal pipeline, the method manufactures a plurality of pairs of variable-section and semicircular shells with the same dimensions and structures; the size of an inside diameter of each shell is equal to that of the outside diameter of the benthal pipeline; the outside diameter is changed along the axial direction and makes transition through a bevel; two ends of each shell are thick; the middle part is thin; the outer surface of the middle part of each shell is fixed with a spiral lateral plate and provided with an extended ocular plate; after one pair of the shells is connected to form a variable-section circular column, the spiral lateral plates in the middle parts of the shells are mutually coincided to form the same spiral structure to form a buckle arrestor; and one buckle arrestor is arranged in the radial direction of the benthal pipeline at intervals of a certain distance in the following method. The method can reduce cost, effectively controls the buckle propagation and vortex-induced vibration of the benthal pipeline and realizes the unification of economy and safety.
Owner:TIANJIN UNIV
Active vortex-induced vibration suppression device
InactiveCN105201420AHas a spoiler effectExtend your lifeDrilling rodsFluid dynamicsImpellerDrive shaft
The invention provides an active vortex-induced vibration suppression device, belonging to the field of vortex-induced vibration suppression devices for marine risers. The device comprises a fixed seat, two vane rotators, a rotating seat, a rotating seat cover, an external guide plate, an internal guide plate and a transmission shaft, wherein the two vane rotators are installed on the fixed seat of a limiting hoop device; the rotating seat and the rotating seat cover are connected through bolts and are installed on the fixed seat of the limiting hoop device; the gear end of the transmission shaft is meshed with the gear ends of the vane rotators; the middle part of the transmission shaft is combined with a bearing and installed on a support seat; the support seat and a support seat cover are connected through bolts; an impeller is installed at the smooth end of the transmission shaft through a key groove and nuts and arranged in a pump barrel; a cover board is connected with the pump barrel of the impeller through bolts; the external guide plate is articulated with the rotating seat; and one end of the internal guide plate is embedded at the inner side of the external guide plate, and the other end of the internal guide plate is articulated with a push rod. The active vortex-induced vibration suppression device is skillful in structural design, high in application value, and capable of better suppressing vortex-induced vibration of marine risers at high and low flow rates.
Owner:SOUTHWEST PETROLEUM UNIV
Method for suppressing vortex-induced vibration of marine oil pipeline
InactiveCN102352947ASuppression of vortex induced vibrationEconomically viablePipe laying and repairPipe elementsEngineeringSubmarine pipeline
The invention belongs to the technical field of pavement of marine oil pipeline facilities, and relates to a method for suppressing vortex-induced vibration of a marine oil pipeline. In the method, multiple pairs of semicircular shells which are of the same size and are provided with spiral grooves on the outer surfaces are made according to the outer diameter and the wall thickness of the marine oil pipeline; outwardly extending eye plates are arranged; after a pair of shells is connected into an annular post, the spiral grooves on the shells are matched with each other to form the same spiral structure for constituting a sleeve; and sleeves are arranged in the radial direction of the marine oil pipeline at a certain interval according to the method. Due to the adoption of the method, the vortex-induced vibration of the marine oil pipeline is controlled effectively, and unity of economic efficiency and safety is realized.
Owner:HEBEI UNIV OF ENG
Novel ocean energy self-cleaning type power generating buoy
ActiveCN109292043ASolve energy supply difficultiesReal-time cleaningBuoysCleaning using toolsBuoySeawater
The invention discloses a novel ocean energy self-cleaning type power generating buoy. A wind-photovoltaic integrated generating assembly is mounted at the upper end of a buoy lamp by a base. A cabinbody is connected to the lower end of the buoy lamp. The wind-photovoltaic integrated generating assembly comprises a wind generator set and a modularization photovoltaic generator set. The modularization photovoltaic generator set is divided into three areas. Rotor blades of the wind generator set are mounted on the upper surface of a photovoltaic generating panel of the photovoltaic generator set. A dedusting device is mounted in each rotor blade. The dedusting devices face the generating panel of the photovoltaic generator set. The wind generator set and the photovoltaic generator set respectively convert wind energy and solar energy into electric energy to power the buoy together. A tension leg mooring system with double-permeable pendant plates fixes the buoy to seawater. The day andnight alternation working mode is adopted, the rotor blades with dedusting brushes of the wind generator clean the photovoltaic generating panel during rotating, and therefore light transmittance of the photovoltaic generating panel is guaranteed. The tension leg mooring system with the double-permeable pendant plates guarantees that the buoy can work stably in the severe environment.
Owner:JIANGSU UNIV OF SCI & TECH
Marine riser vortex-induced vibration suppression device
ActiveCN104747098AReduce resistanceReduce wake effectsPipe laying and repairDrilling rodsVertical tubeSurface ocean
The invention discloses a marine riser vortex-induced vibration suppression device. The marine riser vortex-induced vibration suppression device is arranged on a marine riser. The marine riser vortex-induced vibration suppression device comprises a V-shaped front end panel and a tail fin type fairing. The V-shaped front panel board is arranged on the side, facing the marine current direction, of the marine riser. The tail fin type fairing is arranged on the side, back to the marine current, of the marine riser. The cross section of the V-shaped front end panel is V-shaped, and is tangent to the surface of the marine riser. The marine riser vortex-induced vibration suppression device has the advantages that by arranging V-shaped wing boards on the V-shaped front end panel, swinging in a small range can be achieved along with the current, incoming flow is led to be scattered, meanwhile resistance force on the marine riser due to the incoming flow can be lowered, the vortex-induced vibration can be effectively suppressed, lift force is greatly lowered, and the fatigue life of the riser is prolonged; the vortex-induced vibration suppression device has the advantages of being simple in structure, and convenient to process and install due to blocking.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA) +1
Split streamline steel-concrete composite box girder
ActiveCN103452036AGood aerodynamic shapeIncrease structural dampingBridge materialsBridge deckLight rail
The invention discloses a split streamline steel-concrete composite box girder comprising two or three horizontal steel-concrete composite box girder units. An air nozzle is disposed outside each steel-concrete composite box girder unit. A channel 4m-20m in horizontal width is formed between each two steel-concrete composite box girder units. Connecting beams are disposed at intervals of 4m-20m longitudinally along the channels. A top plat of each steel-concrete composite box girder unit is a concrete plate, and a bridge deck pavement for automobiles is paved on the top plate; a bottom plate and an oblique web in each girder unit are reinforced steel plates; rails for trains or light rail vehicles are arranged on the bottom plate; each oblique web is provided with round, elliptical or polygonal light holes. The split streamline steel-concrete composite box girder has the advantages that wind proofing stability of bridges can be improved effectively, vortex-induced vibration is suppressed, durability of the bridge deck pavement is improved, and the girder is applicable to highway bridges or highway and light-railway bridges and is simple in structure and well economical.
Owner:CCCC HIGHWAY BRIDNAT ENG RES CENT
Lip type reversing coupling double-spiral blade type vortex induced vibration restraining device for deep sea vertical pipe
InactiveCN102003152AReduce stress concentrationSuppression of vortex induced vibrationDrilling rodsDerricks/mastsSpiral bladeCoupling
Owner:HARBIN ENG UNIV
Vortex induced vibration suppression device with axial direction slip rotary impeller pair and method
InactiveCN106499352AControl distanceAvoid collisionDrilling rodsDrilling casingsImpellerVertical tube
The invention relates to a vortex induced vibration suppression device with an axial direction slip rotary impeller pair, and a method; the vortex induced vibration suppression device comprises an upper rotary member, a lower rotary member, a sleeve, two fixed rings and four springs; slider rails are arranged on the outer wall of the sleeve; the rotary members can slide on the slide rails; the outer peripheral surface of the rotary member is provided with arc-shaped blades capable of freely rotating under water impact; the springs can control the distance between the two rotary members; the fixed rings can limit the slip of the rotary members; the blades and springs can affect seawater streaming, can break a boundary layer, thus providing passive vortex induced vibration control effect; the rotating blades and the axial slip rotary members can deeply damage a vertical tube wall surface streaming boundary layer, thus providing active vortex induced vibration control effect; the active and passive vortex induced vibration suppression functions can be combined.
Owner:SOUTHWEST PETROLEUM UNIV
Sieve hole air-jetting vortex-induced vibration suppression device and method
InactiveCN103883268AReduce flow resistanceSuppression of vortex induced vibrationDrilling rodsFluid dynamicsSeawaterWater pipe
The invention relates to a sieve hole air-jetting vortex-induced vibration suppression device and method. The sieve hole air-jetting vortex-induced vibration suppression device is characterized by comprising an air injection pipe, a U-shaped flow guide bent pipe, a bottom air exhaust sieve pipe, an air exhaust sieve pipe, a top air exhaust sieve pipe, an air distribution plate, a base plate and a top plate, wherein the air exhaust sieve pipe is arranged outside a water isolation pipe in a sleeved mode, the air injection pipe leads high-pressure air flow into an annular space between the air exhaust sieve pipe and the water isolation pipe through the U-shaped flow guide bent pipe, the air flow flows out from air exhaust holes in the air exhaust sieve pipe, a seawater streaming boundary layer on the surface of a pipeline is damaged, formation of vortexes of the tail of the pipeline is interfered, and vortex-induced vibration is effectively suppressed. The sieve hole air-jetting vortex-induced vibration suppression device and method can deal with flow in different directions, is not corroded or damaged easily, is put in along with the water isolation pipe in the on-site construction process, does not affect the normal construction process, can be recycled after construction, and saves cost.
Owner:SOUTHWEST PETROLEUM UNIV
Method for inhibiting vortex-induced vibration of novel deepwater drilling riser
InactiveCN101975036ASuppression of vortex induced vibrationLow costDrilling rodsDerricks/mastsDeepwater drillingWork cycle
The invention relates to a method capable of effectively inhibiting the vortex-induced vibration of a deepwater drilling riser. In the method, a buoyancy-block distribution scheme is optimized according to the influence rule of a buoyancy-block distribution form for the vortex-induced vibration fatigue characteristic of a riser system, i.e. buoyancy singles and naked singles are configured in a staggered manner from top to bottom according to the proportion of 1:3 to promote the response frequency of the deepwater riser system to be together controlled by buoyancy blocks and the riser and avoid the vortex-induced vibration of the system. The method for inhibiting the vortex-induced vibration of the deepwater drilling riser provided by the invention can effectively inhibit the vortex-induced vibration of the riser without installing an additional vortex-induced vibration inhibiting device, shortens the working cycle, saving the drilling cost and realizes the unification of safety and economical property.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Method for inhibiting vortex-induced vibration of marine riser
InactiveCN102226380ASuppression of vortex induced vibrationSimple manufacturing processDrilling rodsFluid dynamicsStrakeEngineering
The invention belongs to the technical field of laying of marine risers and relates to a method for inhibiting vortex-induced vibration of a marine riser. The method comprises the following steps: (1) manufacturing a plurality of pairs of semi-circular ring-shaped shells of the same size according to the size of the outer diameter of the marine riser, wherein spiral strakes and spiral grooves arearranged on the outer surface of each shell in a staggered manner, when each pair of shells are combined into an annular column, and the spiral strakes or the grooves distributed on the outer surfaces of the two shells are combined into a spiral structure; and (2) fixedly mounting one pair of shells in the radial direction of the marine riser at intervals, wherein the two shells are closely jointed on the surface of a pipeline, a sleeve is formed in a way of combining the spiral strakes or the grooves on the outer surfaces of the two shells into the spiral structure, and the sleeve is fixedlyconnected to the marine riser. By adopting the method, the vortex-induced vibration of the marine riser can be effectively controlled, and the unification of economy and safety can be realized.
Owner:TIANJIN UNIV
Submarine pipeline vortex-induced vibration inhibiting method
InactiveCN101216138ASuppression of vortex induced vibrationReduce the possibility of resonancePipe laying and repairPipe elementsEngineeringProcess complexity
The invention relates to a method for inhibiting the vortex-excited oscillation of a submarine pipeline. The method comprises the following steps: (1) fabricating tongue-like flow-guiding sheets of different sizes and curvatures according to the inner and outer diameters of the submarine pipeline to be protected, allowing each sheet to be tapered from the bottom to the top, forming a square wave-shaped notch at the bottom edge of each sheet, fixing a Z-shaped trip wire on the outer wall of each sheet, and allowing the square wave-shaped notches of the sheets in pair to be engaged with each other; (2) assembling and fixing flow-guide shields on the submarine pipeline at a distance 1.5-2.5 times of the outer diameter of the submarine pipeline, wherein each flow-guide shield is formed by two flow-guide sheets by assembly and welding, forming two symmetric shell bodies with raised middle part and two interconnected top ends, so that the submarine pipeline is enclosed therein. The inventive method can efficiently control the vortex-excited oscillation and simultaneously control the construction complexity and cost in an acceptable range, and realizes the optimization of construction complexity, construction cost and inhibitory effect on vortex-excited oscillation.
Owner:TIANJIN UNIV
Rotatable pentagonal impeller type vortex-induced vibration inhibiting device and method
InactiveCN103437717AExtended service lifeAchieve free spinsDrilling rodsFluid dynamicsImpellerEngineering
The invention discloses a rotatable pentagonal impeller type vortex-induced vibration inhibiting device and method. The device is characterized by consisting of a plurality of basic units. The base units comprise three parts, namely a pentagonal impeller, cylindrical rollers and a fixed snap ring. The pentagonal impeller is sleeved outside a marine riser, two side surfaces at each corner of the impeller are different in shape, and arc-shaped sockets are formed in both ends of the pentagonal impeller, the cylindrical roller are inserted into the arc-shaped sockets and the movement of the pentagonal impeller in the axial direction is limited by installing the fixed snap ring. Under the coordination of the pentagonal impeller and the cylindrical rollers, the pentagonal impeller can freely rotate at 360 degrees to respond incoming flows in different directions and effectively damage the formation of a vortex behind the marine riser, so as to inhibit the vortex-induced vibration.
Owner:SOUTHWEST PETROLEUM UNIV
Propeller type synchronous power generating and vibration suppression device and method with piezoelectric panel
InactiveCN106884618ASuppression of vortex induced vibrationValid conversionDrilling rodsPiezoelectric/electrostriction/magnetostriction machinesSea wavesMagnetic tape
The invention relates to a propeller type synchronous power generating and vibration suppression device and method with piezoelectric panel. The device comprises a rotating module and a conductive module. The conductive module comprises a spiral coil, a conductive ring coil, a ring coil fixing plate, a fixed plate upper clamp, a fixing plate lower clamp, connecting conductors, output conductors and a coil sleeve. The rotating module comprises a blade outer sleeve, a rotating bearing, an embedded magnetic tape blade, a piezoelectric panel, piezoelectric panel conductors and a rotating clamping hole. The rotating module rotates around a vertical pipe under the flushing of sea waves to achieve the cutting of magnetic induction lines and the deformation of the piezoelectric panel simultaneously to generate electric current. At the same time, when the embedded magnetic tape blade and the piezoelectric panel rotate, the flow field surrounding the vertical pipe is undermined, the separation of boundary layers and the generation of vortexes are interfered, therefore the vortex induced vibration is inhibited, the device and method hit two birds with one stone.
Owner:SOUTHWEST PETROLEUM UNIV
Surrounding body and equipment for inhibiting vibration of enclosure protection structure and method for hoisting tower drum
ActiveCN107461304ASuppress lateral vibrationSuppression of vortex induced vibrationWind motor assemblyWind motor supports/mountsElastomerTower
The invention discloses a surrounding body and equipment for inhibiting vibration of an enclosure protection structure and a method for hoisting a tower drum. The surrounding body can surround the enclosure protection structure, faces the outer surface of the inner side of the enclosure protection structure and is provided with a plurality of elastomers which extrude the enclosure protection structure under the action of an upwind inflow, and during extrusion, an airflow scaling flow passage is formed among the elastomers; and an airflow in the scaling flow passage has the air blowing function to the upper enclosure protection structure boundary layer, so that the airflow, on the upper side, flowing around the wall of the enclosure protection structure is interfered, the boundary layer at the position is destroyed, and formation of a Karman vortex street is inhibited and destroyed. According to the technical scheme of the invention, the natural force is fully utilized, and in the premise of greenness and environmental protection, the optimal turbulent flow breaking effect is achieved, the phenomenon of the Karman vortex street is inhibited, occurrence of vortex-induced vibration is hindered, or vibration is reduced.
Owner:BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
Vortex-induced vibration suppression experimental device based on nonlinear energy trap
ActiveCN110715782ASuppression of vortex induced vibrationSimple structureHydrodynamic testingVibration testingEngineeringMechanical engineering
The invention discloses a vortex-induced vibration suppression experimental device based on a nonlinear energy trap. The vortex-induced vibration suppression experimental device comprises an experimental water tank, a connecting and fixing device and a vibration damping device, wherein a water tank cover is arranged on the top of the experimental water tank; the connecting and fixing device comprises guide rails, a test piece, a support and a first spring, the guide rails are fixed on the inner walls of two opposite sides of the experimental water tank, the lower end of the support is connected with the test piece, the upper end of the support is connected with the first spring, and the cylindrical test piece and the support slide up and down along the guide rails; the vibration damping device comprises a stainless steel square box, a nonlinear spring and a linear damper, and the bottom surface of the stainless steel square box is connected with the first spring downwards; the bottom of the nonlinear spring and the bottom of the linear damper are connected with the stainless steel square box, and the top of the nonlinear spring and the top of the linear damper are connected with the water tank cover; a plurality of slots are formed in the side surface of the stainless steel square box, and mass sheets are selectively inserted into the slots. The vortex-induced vibration suppression experimental device provided by the invention is simple in structure, various adjustable parameters such as design mass, rigidity and damping are designed, and vortex-induced vibration can be effectively suppressed.
Owner:HOHAI UNIV
Spoiler, fan tower and wind driven generator comprising same
PendingCN109737012ASimple structureReduce manufacturing costFinal product manufactureWind motor supports/mountsWind drivenEngineering
The invention discloses a spoiler, a fan tower and a wind driven generator comprising the same. The spoiler comprises a spoiling part and a connecting part; the spoiling part comprises a spoiling endand multiple side surfaces; the spoiling end and the multiple side surfaces are connected to form a polyhedron; the spoiling end is positioned at the front end of the spoiler; the connecting part is an annular connecting part; and the spoiling part is arranged on the outer side of the annular connecting part. In the spoiler, the fan tower and the wind driven generator comprising the same, the spoiler consisting of the annular connecting part and the spoiling part is simple in structure, low in production cost and convenient to mount in a needed place. The spoiler is mounted before tower lifting of the wind driven generator, has the same design life with a tower main body, can inhibit the vortex-induced vibration of the tower in the whole life period of the wind driven generator, has no need to be maintained in the whole life period of the wind driven generator, and is low in use cost.
Owner:SHANGHAI ELECTRIC WIND POWER GRP CO LTD
Guide streamer
The invention relates to a guide streamer, which is made of a waterproof cloth material for making raincoats. The guide streamer is wrapped outside a towrope, and a ratio of the length L of the guide steamer to the diameter D of the towrope is 8-10; the guide streamer wrapped at the root of the towrope is compressively bonded together by adopting a high-frequency hotpressing machine, wherein the compressive bonding width is more than 15mm; the compressively-bonded guide streamer is cut into a plurality of strips with even width which is about 5-10 times of the diameter of the towrope; cut edges of the guide streamer are compressively-bonded together by adopting the high-frequency hotpressing machine; and compressively-bonded seams generated by compressively bonding the guide streamers together are firmly sewn by adopting a portable sewing machine. The guide streamer disclosed by the invention has the beneficial effects that: the guide streamer is capable of greatly reducing resistance of the towrope and restricting vortex-induced vibration of the towrope; meanwhile the guide streamer has the advantages of simple manufacturing method, low cost, high reliability and long service life.
Owner:THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
Pipe components and methods of manufacture
InactiveCN105378213ASuppression of vortex induced vibrationExtend your lifePipe laying and repairDrilling rodsBuoyancyBiomedical engineering
A connector assembly including a body portion (824) for locating over a flexible pipe and arranged to be connectible to or formed integrally with one or more buoyancy compensating elements (800), and one or more protrusion (826) extending from the body portion (824) and arranged to reduce or interrupt vortex induced vibrations in water surrounding the flexible pipe in use.
Owner:GE OIL & GAS UK LTD
Marine riser vortex-induced vibration abatement device
ActiveCN104790881AReduce resistanceReduce wake effectsDrilling rodsFluid dynamicsSmall amplitudeWater flow
The invention discloses a marine riser vortex-induced vibration abatement device. The marine riser vortex-induced vibration abatement device comprises a V-shaped front end panel and a V-shaped back end panel; the V-shaped front end panel is installed on the face, facing the ocean current flowing direction, on a marine riser, and the V-shaped back end panel is installed on the face, back to the ocean current flowing direction, on the marine riser; the cross section of the V-shaped front end panel and the cross section of the V-shaped back end panel are in V shapes, and the V-shaped front end panel and the V-shaped back end panel are in tangency with the surface of the marine riser. The marine riser vortex-induced vibration abatement device has the advantages that as a V-shaped wing plate is installed on the V-shaped front end panel, small-amplitude swing can be performed along with water flow, the resistance of the coming flow to the marine riser can be reduced while the coming flow is guided to be scattered, the vortex-induced vibration is effectively abated, and the fatigue life of the riser is prolonged.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Spiral fluid disturbance and vibration suppression device for marine riser
ActiveCN111075801ASuppression of vortex induced vibrationGood omnidirectional vibration suppression efficiencyDrilling rodsFluid dynamicsMechanical engineeringMechanics
The invention discloses a spiral fluid disturbance and vibration suppression device for a marine riser. The spiral fluid disturbance and vibration suppression device comprises a riser (12), a plurality of sections of riser sleeves (14) which are sequentially connected are arranged on the outer surface of the riser (12) in a nested manner; each section of the riser sleeve (14) is provided with three spoiler groups (6) which are welded at equal intervals; each spoiler group (6) comprises a plurality of spoilers (5) which are distributed in a spiral line shape; and the spacing distance between any two adjacent spoilers (5) in each spoiler group (6) is equal. The disclosed spiral fluid disturbance and vibration suppression device for the marine riser can effectively suppress the fact that vortex-induced vibration of the marine riser occurs, has the characteristics of good omnidirectional vibration suppression efficiency and good resistance performance, and has the advantages of great practical significance.
Owner:TIANJIN UNIV
Breathing unit flow control device based on large-span bridge wind field three-dimensional spreading disturbance
InactiveCN110158446AImprove control effectSuppress chatterBridge structural detailsTraffic capacityHoneycomb
The invention discloses a breathing unit flow control device based on large-span bridge wind field three-dimensional spreading disturbance. The device comprises a breathing unit pipeline, variable frequency axial flow fans and rectification honeycomb devices. The breathing unit pipeline is arranged sharp corners, close to the front edge side and rear edge side, of the bottom of a main beam. Breathing units are arranged at equal intervals in the breathing unit pipeline. The two ends of the breathing units are provided with air suction ports and air blowing air ports correspondingly. The variable frequency axial flow fans are arranged inside and are used for providing suction and blowing flow. The rectification honeycomb devices are arranged at the air ports to form uniform flow. According to the device, the two different effects of air suction and air blowing are generated at the two air ports of a pipeline by adopting a fan, the breathing unit is used as a disturbance source to inhibitthe formation and development of wake large-scale spanwise vortex, and main beam wind-induced vibration is controlled. The breathing units are arranged at certain intervals in the spreading direction, and three-dimensional spreading disturbance control is carried out on a flow field, so that the occurrence of vortex-induced vibration can be effectively inhibited or weakened, and meanwhile, the main beam flutter critical air speed can be effectively increased.
Owner:NORTHEAST FORESTRY UNIVERSITY
Vortex-induced vibration suppression device and method capable of being quickly assembled and disassembled
ActiveCN111071389ASuppression of vortex induced vibrationFlexible responseTowing/pushing equipmentStrakeHelix angle
The invention discloses a vortex-induced vibration suppression device and method capable of being quickly assembled and disassembled. The device mainly comprises an automatic winding-unwinding storagewinch and the like. The automatic winding-unwinding storage winch is coaxially arranged on an armored cable in a sleeving mode and moves in the axial direction. A flow guide ribbon is wound and stored in the automatic winding-unwinding storage winch, the two tail ends of the flow guide ribbon are fixed to the armored cable through hoops, a rope arrangement rotating ring and a belt rope rotating ring are coaxially installed on the automatic winding-unwinding storage winch, and the flow guide ribbon is guided, positioned, released and recycled through the rope arrangement rotating ring and thebelt rope rotating ring. Vortex-induced vibration suppression effects of the diversion ribbons and the spiral strakes are comprehensively used, and vortex-induced vibration of the armored cable in water can be effectively suppressed; quick assembly and disassembly and high use efficiency are achieved; the spiral angle and the screw pitch formed by the diversion ribbons on the armored cable can beadjusted at any time, so that the applicability is high; the flow guide ribbon covers the armored cable by 360 degrees; and the vortex-induced vibration suppression device is also suitable for marinerisers, marine platform jackets and other cylindrical structures in ocean engineering and used for suppressing vortex-induced vibration.
Owner:THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
Double-spin vortex breaking device for inhibiting vortex-induced vibration of steel tube high-rise structure
The invention provides a double-spin vortex breaking device for inhibiting vortex-induced vibration of a steel tube high-rise structure. The device comprises two annular bases which are arranged parallelly and vertically, and the outer wall of each base is rotationally sleeved with an annular rotating arm; the outer wall of each rotating arm is fixedly provided with four connecting arms, and the connecting arms are arranged uniformly around the axes of the rotating arms; the upper and lower bases are fixedly connected through rectangular plates, one edges of the rectangular plates are fixedlyconnected with the connecting arms of the upper and lower bases, the corresponding other edges of the rectangular plates are provided with two rotating rods, and the two rotating rods are parallel tothe connecting arms; one ends, away from the rectangular plates, of the rotating rods are rotationally provided with connecting rods, and the other ends of the connecting rods are fixedly provided with four hemispherical shell-shaped wind cups respectively. In short, the double-spin vortex breaking device has the advantages that the vortex-induced vibration of the steel tube high-rise structure generated in the transverse wind direction is inhibited, the safety of the steel tube high-rise structure is improved, and the economic loss is reduced.
Owner:ZHENGZHOU UNIV
Active flow controller for inhibiting vortex-induced vibration based on deep reinforcement learning and control method
ActiveCN113296408AReduce vibration amplitudeChange configurationAdaptive controlDecision makerControl objective
The invention provides an active flow controller for suppressing vortex-induced vibration based on deep reinforcement learning and a control method. According to the active flow controller disclosed by the invention, a deep reinforcement learning decision-making agent is established based on a Soft Actor-Critic algorithm, and a robust real-time control strategy is output through continuous interaction with a flow environment. A reward and punishment function related to a vortex-induced vibration state in a cylinder transverse flow direction and cylinder surface resistance is established, an artificial neural network weight in a decision-making agent is dynamically learned and adjusted, and a mapping relation from flow states such as flow environment speed and pressure to control actions is established, so that the active flow controller is obtained. The active flow controller is used for controlling the air suction and blowing devices symmetrically installed on a cross flow pole of a cylinder, and the two control targets of vibration suppression and resistance reduction of the cylinder can be achieved.
Owner:ZHEJIANG UNIV
Casting mold for vortex-induced vibration suppression device
The invention discloses a casting mold for a vortex-induced vibration suppression device. The casting mold comprises an underframe, a rotating tilt stand, a female die, a female die support, a male die, a male die support, a rotating mechanism, a pressing mechanism, a hydraulic station, a heating device and the like; the female die consists of a semicircular female mold with a spiral groove, and a built-in heating coil; the male die consists of a semicircular male mold; the rotating mechanism and the pressing mechanism are hydraulic power mechanisms to control the rotating tilt stand and the male mold to oscillate; the mold comprises two sets to realize the casting of two parts of the vortex-induced vibration suppression device; and finally the two half parts are assembled into a molded product of the vortex-induced vibration suppression device.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Tower frame vibration damping device and tower frame comprising same
PendingCN109441730AImprove stabilitySmall footprintNon-rotating vibration suppressionWind motor supports/mountsRandom vibrationTurbine
The invention provides a tower frame vibration damping device and a tower frame comprising the tower frame vibration damping device. The tower frame vibration damping device comprises a supporting system, wherein the supporting system comprises a supporting rod and a first connecting block, the supporting rod is fixed on the surface of a tower frame through the first connecting block; the tower frame vibration damping device further comprises a pull rope, a damper module and an anchor pile system fixed on the ground, wherein the supporting system, the pull rope, the damper module and the anchor pile system are connected in sequence. According to the tower frame vibration damping device and the tower frame comprising the tower frame vibration damping device, the supporting system, the pullrope, the damper module and the elastic system are combined to use, so that the effects of jointly restraining the vortex-induced vibration and the random vibration of the tower frame are achieved, meanwhile, the stability of a wind turbine is improved by the horizontal and vertical tension provided by the pull rope, and the whole device is small in occupied space, practical in structure, low in cost and high in construction feasibility.
Owner:SHANGHAI ELECTRIC WIND POWER GRP CO LTD
Synchronous power generation and vibration suppression device and method for sleeving rotatable abacus-shaped power generation frame
ActiveCN113107741AFull conversionEffective rotationPipe elementsMachines/enginesClassical mechanicsMechanical engineering
The invention relates to a synchronous power generation and vibration suppression device and method for sleeving a rotatable abacus-shaped power generation frame. The device is composed of a sleeve assembly and a rotating assembly. A calabash-shaped protective cover is sleeved outside a marine riser, and the back flow side of the calabash-shaped protective cover is connected with three tail supporting frames which are arranged at intervals of 45 degrees. An ocean current impacts the tail supporting frames to drive the whole device to rotate around the marine riser. Under the combined action of axial diameter change and rotation of the calabash-shaped protective cover, stretching and retracting of a horizontal spring and a vertical spring, movement of a mass ball and swinging of a round hole tail plate and a square hole tail plate, formation and development of a marine riser streaming vortex are destroyed, and then vortex-induced vibration is restrained. The springs continuously stretch out and draw back under the action of ocean current impact and streaming, a magnetic bar is driven to move and displace, a power generation coil and an embedded coil cut magnetic induction lines formed by the magnetic bar, induction current is generated, and ocean current energy conversion is achieved.
Owner:SOUTHWEST PETROLEUM UNIV
Herringbone column power transformation frame steel tube lightning rod capable of alleviating wind-induced vibration
InactiveCN107819273ASuppression of vortex induced vibrationIncrease stiffnessCorona dischargeSteel tubeEngineering
The invention discloses a herringbone column power transformation frame steel tube lightning rod capable of alleviating wind-induced vibration. The herringbone column power transformation frame steeltube lightning rod comprises a herringbone column, wherein a substrate is fixedly mounted on the top of the herringbone column; the upper part of the substrate is connected with a flange plate througha bolt; a lightning rod tube body is arranged at the center of the flange plate; a plurality of reinforcing ribs are uniformly distributed on the external circumference of the bottom of the lightningrod tube body; and a spiral flow guide plate is arranged on the surface of the lightning rod tube body. According to the device, the reinforcing ribs are uniformly arranged on the external circumference of the bottom of the lightning rod tube body, so that the rigidity of a nodal region, connected with the flange plate, of the tube body can be effectively improved, and the destroy of the nodal region caused by the effect of wind-induced vibration is reduced; crossed stiffening ribs are arranged inside the lightning rod tube body, so that the rigidity of the tube body can be improved, and thewind-induced vibration of the tube body is reduced; the spiral flow guide plate is arranged on the surface of the lightning rod tube body, so that the track of coming wind can be disturbed, an eddy with stable frequency cannot be formed, and then vortex-induced vibration of the lightning rod tube body is effectively inhibited.
Owner:ZHENGZHOU UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com