294 results about "Design load" patented technology

The present invention provides an annular beam of monolithic construction of one homogeneous material and a related efficient, low-cost non-pneumatic tire. Specific geometric design, combined with nonlinear elastomer physical properties, enable the suppression of all reinforcing belts, continuous fibers, or other strengthening layers in the annular beam. The annular beam consists of at least two bands that are continuous in the circumferential direction and connected by a web geometry. The non-pneumatic tire consists of the annular beam, a ground contacting portion, a central wheel, and a plurality of web spokes that connect the wheel and beam. When the tire is loaded to a design load against a flat surface over a design contact length, a contact area of essentially uniform pressure is produced, while the load is transmitted from the beam to the hub via tension in the web spokes. The tire can be economically manufactured.

A method of analyzing vibrations of a rolling element bearing installed in a rotating machine includes accessing vibration data corresponding to the bearing to be analyzed, determining a degraded condition factor BD for the bearing, selecting an expected designer-determined mean-time-to-failure MTTF of the bearing operating under a design load in the operating environment of the rotating machine, selecting a forecast time period, calculating a reduced mean-time-to-failure RMTTF of the bearing using the expected designer-determined mean-time-to-failure MTTF and the degraded condition factor BD, calculating a probability of failure of the bearing in the forecast time period using the reduced mean time to failure RMTTF, accessing cost data corresponding to a cost of failure of the bearing in the rotating machine, calculating a financial risk from the calculated probability of failure in the forecast time period and the cost data, and displaying the financial risk for the selected time period.

A multiplexed torque brake (MTB) system for preventing the accumulation of torsional forces at a center drive and thereby significantly reducing the design load requirements for trough frames of a corresponding solar concentrator assembly (SCA). In one embodiment, an MTB system for an SCA having a plurality of solar reflector frames spaced along a length of the SCA includes a plurality of brake mechanisms arranged at locations spaced apart from each other along the length of the SCA, each of the brake mechanisms coupled to a corresponding one of a plurality of supporting pylons and configured to constrain the solar reflector frames from rotating when subjected to torsional loads, the brake mechanisms adapted to transfer the torsional loads to the corresponding supporting pylons.

Aspects of the invention relate to a system and method for operating a turbine engine assembly. The turbine engine assembly has a turbine engine having a compressor section, a combustor section and a turbine section. The combustor section has a lower T_PZ limit and the turbine engine has a design load. The assembly further includes at least one air bleed line from the compressor and at least one valve for controlling air flow through the bleed line. Control structure is provided for opening the valve to allow bleed air to flow through the bleed line when an operating load is less than the design load. The flow rate through the bleed line is increased as the operating load is decreased, reducing the power delivered by the turbine assembly while maintaining the T_PZ above a lower T_PZ limit. A method for operating a turbine engine assembly is also disclosed.

A computer implemented method, apparatus, and computer usable program product for symmetric and anti-symmetric control of aircraft flight control surfaces to reduce wing-body loads. Commands are sent to symmetrically deploy outboard control surfaces to shift wing air-loads inboard based on airplane state and speed brake deployment. Surface rate retraction on a wing with peak loads is limited to reduce maximum loads due to wheel checkback accompanied by utilization of opposite wing control surfaces to retain roll characteristics. Airloads are shifted inboard on a swept wing to move the center of pressure forward, thereby reducing the tail load required to perform a positive gravity maneuver. In a negative gravity maneuver, speed brakes are retracted, thereby reducing the positive tail load and reducing the aft body design loads. High gain feedback commands are filtered from wing structural modes above one hertz by a set of linear and non-linear filters.

The invention relates to a method for optimizing combustion of a boiler. The combustion optimization of the prior boiler mainly depends on debugging stuffs to do experiments, thereby taking time and labor and obtaining limited parameter combinations. The method includes the following steps: collecting working parameters of the boiler and corresponding indexes characterizing the combustion characters of the boiler and building a real-time database; adopting an integrated modeling method supporting a vector machine to carry out modeling under the condition that the real work load is 60 percent smaller than the design load of the boiler and adopting a radial basis function neural network integrated modeling method to carry out modeling under the condition that the real work load is60 percent larger than or equal to the design load of the boiler to build boiler combustion models with different indexes; and utilizing the particle swarm optimization algorithm and combining with the built models to optimize the combustion parameter setting of the boiler according to different combustion indexes or index combinations of the boiler. The invention improves the predictive ability of the integral model, greatly improves the predictive ability of the models, and carries out one-line optimization and off-line optimization.

Aspects of the invention relate to a system and method for operating a turbine engine assembly. The turbine engine assembly has a turbine engine having a compressor section, a combustor section and a turbine section. The combustor section has a lower T_PZ limit and the turbine engine has a design load. The assembly further includes at least one air bleed line from the compressor and at least one valve for controlling air flow through the bleed line. Control structure is provided for opening the valve to allow bleed air to flow through the bleed line when an operating load is less than the design load. The flow rate through the bleed line is increased as the operating load is decreased, reducing the power delivered by the turbine assembly while maintaining the T_PZ above a lower T_PZ limit. A method for operating a turbine engine assembly is also disclosed.

This invention allows for the precise determination of an aircraft's landing conditions and whether an aircraft has experienced a hard landing that exceeds the allowable design loads of the aircraft's landing gear. The system comprises a computer that measures signals from an inertial measurement unit (IMU) at high data rates (e.g. 100 Hz) and also records signals from the aircraft avionics data bus. The computer compares the output from the inertial measurement unit's accelerometers against at least one predetermined threshold parameter to determine whether the aircraft's three dimensional landing deceleration is safely within the design allowances or other regulatory limitations, or whether the landing event needs further investigation.

The invention discloses a Bladed fan load processing system based on a Matlab and particularly relates to fan BLADED load calculating preprocessing and postprocessing software based on MATLAB development. The system is divided into four modules, namely, the Bladed load calculating preprocessing module, the Bladed conventional load postprocessing module, the Bladed component load processing module and the Bladed load working condition self-evaluating module. The common load preprocessing and postprocessing process is automated through a calculation procedure, the manual processing time is shortened for load calculating personnel, the repeated work of the load calculating personnel is reduced, and the load preprocessing and postprocessing efficiency is improved. A load calculation model file based on a self-defined working condition table can be automatically generated, the extreme and fatigue load of each component can be automatically extracted and output, the design load of each component is output based on design and procedure generalization and summarization of each component of the complete machine system, the working condition is automatically evaluated and judged through the procedure according to the evaluation indexes of various working conditions, and whether all working condition simulation models and simulation time sequences are normal or not is fast judged.

The invention relates to a construction method for a support structure of a coal tower template for a tamping type coke oven, which comprises the following steps of 1, treating a base of a steel structure supporting platform; 2, manufacturing and installing the steel structure supporting platform; 3, prepressing the steel structure supporting platform: the prepressing materials are a resistance wall for the coke oven and a precast slab for a basement, the steel structure supporting platform is overloaded and prepressed according to 110% design load, an observing point is arranged, and the prepressing time is seven days, and the observation is carried out once a day; 4, installing each falsework of the template; and 5, removing the falsework and the steel structure supporting platform. The construction method can realize effective monitoring by well design of a large-span, high-support and heavy-load template support system, particularly is the first in the country in coal towers with a span of 34.045 meters but the beam does not have cracks, solves the difficult problem of construction of a large-span, high-support and heavy-load structure, adapts to the coking technique to be developed in large size and tamping type coke ovens, and has the advantages of short construction period, revolving material saving, safety, reliability, easy quality control and high concrete strength.

The invention relates to a business middleware service load balancing method, wherein, a three-layer architectural system based on business middleware comprises a foreground terminal, middleware service executing business processing and a background database, wherein, the middleware service is realized by a server formed by more than 2 middleware servers. The invention is characterized in that a domain name server responsible for the domain access of the foreground terminal is arranged; an access control program is operated on the domain name server, the program is used for executing analytic control to the domain name access request of the foreground terminal according to the designed load balancing control strategy. The technical proposal of the invention adopts the DNS technology to allocate the load of the business middleware service, which can realize simple and flexible configuration of load balancing strategy, and allocate the load of the middleware server according to actual needs, thereby improving the ability of the middleware. The invention mainly adopts a mode of software control, and the technical realization charge is low, therefore, the invention is an ideal proposal for the mobile service facilitators, which improves the performance of the business supporting system.

The invention belongs to the technical field of aircraft flying load design, and relates to the improvement on a method for determining a wing structure load when a transportation aircraft drops goods. The method for determining the wing structure load is characterized by comprising the step of initializing aircraft air-dropping goods parameters, the step of analyzing aircraft limited element modals, the step of calculating an aircraft non-steady aerodynamic coefficient matrix, the step of calculating an aircraft air-dropping goods dynamic response, the step of calculating a wing structure load dynamic response, and the step of determining the design load of the wing structure in the process of air-dropping. By means of the improved method for determining the wing structure load when the transportation aircraft drops the goods, the determining precision of the wing structure load is improved, and the safety of the wing structure and the flying safety of the aircraft are guaranteed.

A switching power supply apparatus (200) for controlling the operation of a switching FET (225) adapted for switching a rectified smoothed output of a primary side rectifying smoothing circuit (215) by a switching controlling circuit (230) having a hysteresis low-voltage mistaken operation prohibiting circuit. An output of a ternary winding (220C) of a converter transformer is rectified and smoothed by a rectifying smoothing circuit (238) to drive the switching controlling circuit (230). An output voltage of the ternary winding (220C), varied in dependence upon the load state on the secondary side of a converter transformer (220) is set so as to be lower than a low voltage protective voltage in case the voltage is lower than a design load and so as to be higher than the low voltage protective voltage in case the voltage is higher than the design load, in order to carry out an intermittent operation during standby time. Thus, the switching operation during standby time may be carried out intermittently to minimize the power consumption to realize the energy saving during standby time, simply by adjusting the values of respective key devices, without appreciably changing the pre-existing circuitry.

The invention relates to a data processing method for integrated slab layout and construction of a CRTSIII type ballastless track. CRTSIII type ballastless track slabs lack an appropriate data processing method for data calculation and organization in the processes of slab layout designing, installation, positioning and maintenance. The data processing method for integrated slab layout and construction of the CRTSIII type ballastless track comprises the steps of establishing a route foundation database and carrying out unified management on data with a route mileage as the index; determining slab layout design data and determining the number and the type of the track slabs along the route in a fixed section; adjusting the size of a mould for prefabricated rack slabs of a factory; taking deformation caused by a design load into account and working out installation and positioning coordinate data and three-dimensional coordinates of track benchmark lattice points laid along the middle line of a route. By means of the data processing method for integrated slab layout and construction of the CRTSIII type ballastless track, a structural design is carried out on track slab layout, mould adjustment for fabricated slabs and construction installation data, combination of spatial coordinate data and the route mileage is achieved, the route essential data adopted by a design stage can be directly shifted into a track slab prefabrication and construction installation stage for use, and integration of the design and construction data is achieved.

The invention relates to an experiment method and device for packer operating performance in oil field, testing contact stress and axial displacement of packer rubber tube through making pressurization, pressure stabilization and pressure removal on the experiment device to test the amplitudes and distribution rules of stress and strain of surface characteristic points of the packer parts under the action of external load. And the experiment method: applying pressure on the central pipe of the packer by electric pressure test pump according to the designed load step, setting the packer and keeping the pressure stable for a period of time and besides, testing the stress data on surface characteristic points of the rubber tube in this course; and finally removing the annulus pressure in the upper part of the packer, and then slowly removing the inner pressure in the central pipe and testing the stress data of the surface characteristic points in this course. And the experiment device: packer central pipe and upper and lower joints of the experiment sleeve are respectively connected with electric pressure test pump; the surface of the experiment sleeve is axially, spirally and equidistantly distributed with bores in the part measuring range, and pressure sensors are installed in the bores. And the invention has features of simple structure, high working reliability and higher sensitivity.

The invention discloses a small-range high lift-drag ratio force-measuring balance applied to a low-density wind tunnel. The small-range high lift-drag ratio force-measuring balance comprises a main balance body; and a model connection end, a first combined measuring component, an axial force measuring component, a rolling moment measuring component, a second combined measuring component and a fulcrum bar are arranged at the main balance body successively. According to the invention, the axial force measuring component and the rolling moment measuring component are arranged in the middle of the balance measuring component and the combined measuring components are arranged at the two ends symmetrically so as to reduce the interference on the axial component and rolling torque component by the large normal and pitching torque loads, thereby measuring the rest of four components except the axial force and the rolling torque. On the basis of the designed load and appearance dimension of the small-range high lift-drag ratio force-measuring balance, the force measuring testing requirement of the low-density wind tunnel with the large lift force and complex appearance model is met and thetesting capacity of the low-density wind tunnel is improved effectively. Meanwhile, the anti-interference capability of the axial force measurement precision is enhanced; and the rolling torque sensitivity and measurement accuracy are improved.

The invention relates to a method for offline analyzing and online scheduling of byproduct gas of a metallurgy industry. A data collection server is connected with a gas producing and marketing project control system and can be used for carrying out the online scheduling on a byproduct gas supply and demand system of the metallurgy industry according to data provided by a system through a pipe network mathematical model, a gas supply and demand system prediction model and a gas supply and demand system optimal scheduling model. According to the method for the offline analyzing and the online scheduling of the byproduct gas of the metallurgy industry, the production rates of energy devices of iron and steel enterprises are greatly increased, and the condition that gas appliances work under a design load can be ensured, so that the operation efficiencies of the gas appliances are improved; the gas spreading can be effectively reduced, a secondary gas energy resource can be adequately adopted, and the reasonable operation of the producing economy can be guaranteed; the predicting and processing schemes can be timely, quickly and precisely made, and the influence caused by faults can be controlled at a lowest limit; the scheduling theory basis can be provided for a scheduler, the subjective blindness of the scheduling can be reduced, and a scheduling command can be timely and accurately issued; and important data parameters for leaderships to make decision to straighten the production of the iron and steel enterprises.

The invention provides an earth pressure load determination method of a deeply-buried asymmetric multiple-arch tunnel. The asymmetric multiple-arch tunnel has the mechanical characteristics that the geometry and structure modes are asymmetric, the excavation span is large, the construction processes are various, the structure stress is complex, etc. In supporting structure design, load-structure model checking computations are usually needed, and no mature calculation method is available for load determination. At the background, the asymmetric condition of the geometry and structure modes of left and right tunnel chambers is considered, and based on the basic assumption of two slumping arches of the multiple-arch tunnel, and earth pressure load calculating formulas of the deeply-buried asymmetric multiple-arch tunnel are derived according to Pu's theory. If the a symmetric condition is given to the derived formulas, the derived formulas can be degenerated to the calculating formulas of a normal multiple-arch tunnel, so that the accuracy of the derived formulas is verified; and finally, combined with engineering cases, the rationality of the derived formulas is verified. The research method and conclusion can provided important references for the determination of a design load of the deeply-buried asymmetric multiple-arch tunnel.

The invention discloses a nonstandard wind field oriented wind turbine generator fatigue life efficient assessment method. The steps comprises: 1) according to equivalent fatigue load of a to-be-assessed wind turbine generator under different wind resources, establishing a fatigue load assessment database; 2) detecting actual wind resource value of the to-be-assessed wind turbine generator on a target machine position in a nonstandard wind field, to obtain the equivalent fatigue load corresponding to the actual wind resource value; 3) comparing the equivalent fatigue load with the standard design load of the wind turbine generator, determining whether the fatigue life in the target machine position is in the design range or not; 4) converting the equivalent fatigue load to a corresponding equivalent stress value and calculating a fatigue damage value of the target machine position, and determining whether the fatigue damage value obtained by calculation is in the preset range. The method can effectively assess the fatigue life of the wind turbine generator in the nonstandard special wind field, and is advantaged by simple implementation method, low cost, and rapid and efficient.

The invention discloses a method for alarming the dancing of an overhead transmission circuit. The method comprises the following steps of: (S1) monitoring the dynamic load change condition of an iced lead and measuring the data of a vertical load and a horizontal load in at least one period; (S2) estimating a lead dancing amplitude A according to the change of the horizontal dynamic load; (S3) calculating a maximum dynamic load and a minimum electric gap according to the dynamic load measurement of lead dancing in the step (S1) and the lead dancing amplitude A estimated in the step (2); (S4) calculating the design load and calculating a design electric gap according to the design parameters of an overhang insulator strings, fittings, overhead transmission line leads and a linear tower; and (S5) comparing the maximum dynamic load calculated in the step (S3) with the design load calculated in the step (S4) or comparing the minimum electric gap calculated in the (S3) with the design electric gap calculated in the step (S4) for judging alarm and returning to the step (S1). The invention has the advantages of good line safety and high accuracy.

The invention relates to a method for giving a wire damage alarm when lead wire is coated by ice, which performs calculation and judgment on disconnection, vertical overload of a tower and longitudinal unbalanced tension of the lead wire. The method is implemented by the following work procedures: a, calculating design load and actual load according to tower design, actual vertical span, the design load and ice thickness measurement data; b, at the same time, calculating wire tension and unbalanced tension according to the ice thickness measurement data and wind measurement data; and c, sending early-warning information when any of the design load and the actual load calculation, the wire tension calculation and the unbalanced tension calculation is overloaded. When an icing on-line monitoring device monitors the icing condition of a power supply wire, the method performs calculation and analysis according to the monitored data to judge whether the wire icing condition threatens the safety operation, and send warning signals in time.

A wall structure of an architecture is provided, which comprises an outer wall having resistance against earthquakes and wind and an inner wall relatively inferior in the earthquake-resistance and so forth, so that the outer and inner walls are properly combined to share design loads. The wall structure includes the outer wall (2) of bricklaying structure in which bricks (A˜D) and metal plates (51) are stacked. Fasteners (60,62,63,70) extending through the bolt holes (7) of the bricks are tightened, and the vertically adjacent bricks are integrally connected with each other under prestress of the fasteners. The inner wall (3) is constructed inside of the outer wall, and the shear reinforcement member (10,20) connects the inner and outer walls with each other. The inner wall is constructed by a dry type of construction method, which can support a permanent vertical load such as a roof load. A temporary horizontal load acting on the inner wall, such as a seismic force, is transmitted to the outer wall by the shear reinforcement member.

An apparatus for presenting an area of desired frictional interface on a portion of a user's appendage (e.g., hand or fingers) includes a flexible layer of material having first and opposite sides, with the first side having a frictional engagement surface. The apparatus further includes a flexible backing sheet having first and second opposite faces. A pressure sensitive adhesive is disposed on the second face of the backing sheet. The backing sheet has a central section and opposed tab portions, with the second side of the layer of material affixed to the first face of the backing sheet, in at least a portion of the central section thereof. The tab portions are sufficiently long, in dimension extending away from the central section, so that when the second face of the backing sheet is adhered to a user's appendage, the tab portions extend at least half way around the appendage. The frictional engagement surface has a static coefficient of friction of at least 1.1. The apparatus has a load ratio between a shear force design load an an anticipated load of at least 1.3:1.

A method of analyzing vibrations of a rolling element bearing installed in a rotating machine includes accessing vibration data corresponding to the bearing to be analyzed, determining a degraded condition factor BD for the bearing, selecting an expected designer-determined mean-time-to-failure MTTF of the bearing operating under a design load in the operating environment of the rotating machine, selecting a forecast time period, calculating a reduced mean-time-to-failure RMTTF of the bearing using the expected designer-determined mean-time-to-failure MTTF and the degraded condition factor BD, calculating a probability of failure of the bearing in the forecast time period using the reduced mean-time-to-failure RMTTF, accessing cost data corresponding to a cost of failure of the bearing in the rotating machine, calculating a financial risk from the calculated probability of failure in the forecast time period and the cost data, and displaying the financial risk for the selected time period.

A method for predicting preliminary design load cases using an artificial neural network, the method including obtaining, with a processor, historical data corresponding to an existing structural component, the historical data including finite element modeling analysis data and measured test data for the existing structural component, designing the artificial neural network to include a plurality of neurons to form a numerical model for preliminary design load cases of a new structural component, training, with the processor and the historical data for the existing structural component, the artificial neural network to predict the preliminary design load cases for the new structural component, providing input design parameters for the new structural component to the artificial neural network, and predicting, with the artificial neural network, the preliminary design load cases for the new structural component.

The invention relates to an asphalt mixture mixed ratio design method based on the shearing resistance performance, which is characterized by comprising the following steps of: (1) determining the maximum shearing stress of a structure layer of the designed asphalt mixture; (2) entering a conventional target mixed ratio design stage; (3) determining the shearing resistance intensity of the asphalt mixture designed in the second step; (4) determining the allowable shearing stress of the asphalt mixture; and (5) verifying the shearing resistance performance. The method has the advantages that in the asphalt mixture mixed ratio design, the asphalt mixture shearing resistance design index is provided, the materials and the structure adopt the integral design, and the pertinence is strong. Under the condition of the heavy load traffic, the design load of the heavy load traffic can be determined, the standard load limitation can be broken through, the structural calculation is carried out, the maximum shearing stress of the pavement structure is determined, and the allowable shearing stress of the asphalt mixture is determined through the three-axis shearing tests and the structural analysis, so the designed asphalt mixture meets the requirements of the heavy load traffic and has good shearing resistance performance.