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257 results about "Response analysis" patented technology

Response Analysis refers to the analysis of mitigation plans for emergency or disaster situations. These emergencies or disasters may be naturally occurring (e.g. hurricanes, earthquakes, disease outbreaks, etc.) or man-made (e.g. terrorism, bio-terrorism, industrial accidents, chemical spills, etc.). Since the terrorist attacks of September 11, 2001, the following Anthrax bio-terror attacks, and the disasters precipitated by Hurricane Katrina in 2005, emphasis has been put on the development of mitigation plans to prepare for such situations. The field of response analysis is the effort to analyze, validate, and optimize these mitigation plans using quantitative data and computational tools.

System and method for diagnosing deficiencies and assessing knowledge in test responses

InactiveUS20060014130A1Ease of evaluationElectrical appliancesSubject matterComputerized testing
A system and method for diagnosing deficiencies and assessing knowledge in test responses comprises a computerized testing station for presenting a question to a responder. An initial response analyzer communicates with the testing station for determining the correctness of an initial response by the responder to the question. A necessary knowledge determiner is disposed to analyze an incorrect initial response from the initial response analyzer for detecting responder's deficiencies in past cumulative knowledge and in new subject matter knowledge. A cumulative knowledge analyzer is provided for analyzing the incorrect initial response for identifying specific deficiencies in past cumulative knowledge. A production rule analyzer is provided for analyzing the incorrect initial response for identifying specific deficiencies in new subject matter knowledge. Finally, a report generator communicates with the cumulative knowledge analyzer and the production rule analyzer for generating a written deficiency report.
Owner:WEINSTEIN PINI A

Automobile vehicle body structure fatigue life predicting system

The invention relates to a fatigue life prediction system for a vehicle body structure of a vehicle in the technical field of vehicle design. The prediction system adopts a road spectrum fitting module to establish a combined road spectrum suitable for a field test; a vehicle body loading spectrum acquisition module is adopted to establish an entire vehicle multi-body rigid-flexible coupled model so as to extract the load-time-history at a connecting passage of the vehicle body and a chassis as the input of vehicle body excitation; an automobile body structure dynamic response analysis module is adopted to establish a finite element model of the vehicle body so as to obtain the static stress history generated by gravity and the dynamic stress history generated by road surface excitation of the vehicle body when the vehicle is under the excitation of the combined road spectrum; a dangerous position identifying module of low fatigue life of the vehicle body is adopted to quickly search dangerous positions of low fatigue life through an S-N method and a Miner linear accumulated damage model, and determine the multiaxial stress state of the dangerous positions by using 'biaxiality' analysis; and a fatigue life prediction module of the vehicle body structure is adopted to predict the fatigue lives of the dangerous positions accurately. The fatigue life prediction system for the vehicle body structure can improve the speed and the precision of the fatigue life prediction for the vehicle body structure so as to provide a reference for a real vehicle test.
Owner:SHANGHAI JIAO TONG UNIV

Transmission path detecting system for vehicle system structure vibration and noise

A vehicle system structure vibration and noise transmission path detecting system belongs to the technical field of automobile design. In the invention, a vehicle system analysis model building module builds incentive related bus, vehicle structure and acoustic cavity models and sets up a vehicle system analysis model; a vibration or noise response spectrum acquiring module acquires the vehicle structure vibration or passenger indoor structure noise response analysis; a transfer path power calculating module calculates the transfer power of all transfer paths and the total power transferred to the vehicle; a main transfer path detecting module calculates and orders the contribution of all the transfer paths, and identifies the main transfer paths; an optimized design module identifies the main influential factors for transfer of the power flow of the main transfer paths, applies an optimized design method to improve relevant bus characteristic parameters and structure types, and verifies the parameters in the vehicle system or the vibration absorbing and noise reducing effect after structure improvement. The vehicle system structure vibration and noise transmission path detecting system can improve the accuracy of transfer path identification and possibility of effective control to the transfer paths.
Owner:SHANGHAI JIAO TONG UNIV

Method for optimally designing dynamic property of complete machine tool

The invention discloses a method for optimally designing dynamic property of a complete machine tool, which comprises the following steps of: establishing a complete machine tool entity parameterized model, simplifying the structure according to the analysis requirement on the dynamics and the structure characteristic of the machine tool; and guiding the simplified entity model into a finite element analyzing software ANSYS / Workbench for grid division to obtain a complete machine finite element model. The statics analysis is carried out through the ANSYS / Workbench to obtain a complete machine prestress field, and the mode of the complete machine tool under the prestress field is obtained through the mode analysis. The complete machine tool dynamics response of a main shaft, caused by a cutting force, under different rotating speeds is obtained through resonance response analysis on the complete machine tool, and the reference is provided for the searching of the dynamics thin link and the optimization design. Finally, by using the parameterized analysis method, the rule of influencing the complete machine tool dynamic property by the structure quality and the rigidity parameter is obtained, and the dynamic rigidity thin link is obtained and optimally designed.
Owner:XI AN JIAOTONG UNIV +1

Regional energy comprehensive coordination management and control system

The invention discloses a regional energy comprehensive coordination management and control system. The system comprises a regional operation monitoring subsystem, a distributed power forecasting subsystem, a load cluster prediction response analysis subsystem, a fault fast processing subsystem, an energy analysis and management subsystem, an electric vehicle optimal scheduling subsystem and a regional multi-level energy comprehensive coordination control subsystem. The regional energy comprehensive coordination management and control system achieves comprehensive operation monitoring of power sources, power grids and user loads in a region and forecasting, analysis and scheduling of a variety distributed energy resources on the basis of multi-source information integration, achieves rapid fault diagnosis and processing of the power grid, achieves load forecasting, energy consumption analysis, energy saving management and electric vehicle intelligent scheduling of users and achieves reasonable distribution and pluralistic complementary of regional energy through comprehensive coordination of energy interaction among the power sources, the power grids and the user loads, thereby greatly increasing the energy efficiency and enabling the power grids to be in economical and efficient operation.
Owner:NANJING DIANRUN TECH

Analysis method for testing fatigue life of components based on vibration signals

InactiveCN105651478ASolve the problem that it is difficult to directly obtain structural stress amplitude informationExtended service lifeVibration testingLoad timeEngineering
The invention discloses an analysis method for testing the fatigue life of components based on vibration signals. The analysis method comprises the following steps that (1) a power spectral density function Ga (f) of working field random vibration acceleration load of the components is calculated according to the acquired random vibration acceleration load time domain signals xa(t) of the components; (2) a stress frequency response function HS(f) under the unit acceleration (1g) load of the components is solved by utilizing finite element harmonic response analysis; and a stress power spectral density function of the structure is acquired through combination of (1) based on the working field random vibration acceleration load of the components; and (3) a stress load distribution probability density function of the components is solved according to a Dirlik method by utilizing the working field random vibration acceleration load power spectral density of the components, and a random vibration fatigue analysis load spectrum is established to perform random vibration fatigue analysis on the components. The problem that stress amplitude information of the components working in the complex working conditions is difficult to obtain directly and fatigue life pre-estimation cannot be performed can be solved.
Owner:QINGDAO R & D INST XIAN JIAOTONG UNIV

Built-in self-testing method of FPGA input/output module

The present invention provides a built-in self-testing method of FPGA input / output module. Firstly all input / output modules in FPGA are configured to that a bidirectional IO buffer is used as a circuit to be tested. The logical resource of middle part of FPGA device is configured to a test vector generating circuit. The logical resource surrounding the IO buffer is configured to an output response analysis circuit of scanning chain structure. In testing, the test vector generating circuit generates a pseudo-random exhaustive vector for exerting a test pattern for each circuit to be tested; after executing the test vector, actuating the operation of scanning chain of output response analysis circuit, outputting the built-in self-testing result which is configured this time by the input / output module in the control of test clock by the output response analysis circuit until when the test covers all resources in the input / output module. The method of the invention has the following advantages: simplified built-in self-testing result retrieval mode, reduced test configuration number of times, reduced test cost and increased test efficiency under the precondition of guaranteeing 100% test coverage rate.
Owner:BEIJING MXTRONICS CORP +1

Coaxial rigid rotor pneumatic elastic response method

The invention provides a coaxial rigid rotor coupling pneumatic elastic response analysis method, and belongs to a helicopter kinetic analysis technology. The method is characterized in that according to the operation and control characteristics of a coaxial rigid rotor helicopter, a balance equation optimization solution method is built, and an optimization solution is found according to the given target and constraint conditions. According to the characteristic of complicated coaxial rigid rotor flow field environment, a rotor flow field is calculated by using a computational fluid dynamic method based on an Euler/N-S equation; and then, the coupling pneumatic elastic response is calculated by using a computational fluid dynamic/computational structural dynamic loose coupling analysis method. The coaxial rigid rotor coupling pneumatic elastic analysis method has the advantage that when the analysis method is used, balance operation and control parameters, blade response, rotor loads and the like of the coaxial rigid rotor helicopter can be calculated. The method has good analysis precision and engineering applicability; the relying of the development process on the test can be reduced; and the design period and the development cost can be greatly reduced.
Owner:CHINA HELICOPTER RES & DEV INST

Method for monitoring friction drag and torque of large-displacement well

The invention provides a method for monitoring the friction drag and the torque of a large-displacement well. The method comprises the steps of firstly, building a friction drag and torque mechanical analysis model of the large-displacement well, and compiling an analysis program or analysis software; secondly, carrying out friction drag and torque simulation analysis computing under a track section designing condition; compiling monitoring route maps of drilling tool feed-off hook load, drilling tool lift-up hook load and idling lift-off-well bottom hook load under different friction drag coefficient conditions and route maps of rotary drilling torque along with well depth; recording the drilling tool feed-off hook load, the drilling tool lift-up hook load, the idling lift-off-well bottom hook load and the rotary drilling torque of actual drilling during site operation; finally, describing data under actual drilling record on the route maps, and comparing the data with predicted values under different friction drag coefficients and analyzing. According to the method for monitoring the friction drag and the torque of the large-displacement well, provided by the invention, the reason that causes the friction drag and the torque is deeply analyzed through real-time monitoring on the friction drag and the torque, and meanwhile, response analysis is carried out on the borehole cleanliness degree, the borehole quality, the drilling parameters, a bottom drilling tool combination, the drilling fluid performance change, the use of an anti-friction and torque-reducing tool and the like.
Owner:CHINA PETROCHEMICAL CORP +1

Sensor distribution method for bowstring arc bridge structure made of special-shaped steel tube concrete

Provided is a sensor distribution method for a bowstring arc bridge structure made of special-shaped steel tube concrete. After an integrated finite element model in a full-bridge structure is established and a refined submodel of an inverted triangle rigid frame and a concrete-steel composite beam is built and incision boundary nodes of the submodel of the inverted triangle rigid frame and the concrete-steel composite beam are defined, structural response analysis is performed on the integrated finite element model with the full-bridge structure to determine vulnerability of an integrated stress construction member and monitoring content and monitoring positions on a structural stress integrated analysis layer. Values of freedom degrees of boundary nodes of the integrated model are obtained and inserted on the incision boundary nodes of the refined submodel, and the structural response analysis of the refined submodels is performed sequentially so as to determine the monitoring content and the monitoring positions on the refined submodels of the inverted triangle rigid frame and the concrete-steel composite beam. Compared with a traditional sensor distribution method, the method can accurately solve the problem of distributing sensors on the special-shaped steel tube concrete structure at complex stressed portions and guarantee robustness, effectiveness and economic rationalization of a health monitoring system.
Owner:SOUTHEAST UNIV

Observation system optimization design method based on stack response analysis

The invention relates to an observation system optimization design method based on stack response analysis, which distinguishes the advantages and disadvantages of the observation system through analysis of three-dimensional observation system stack response. The method comprises the following steps of: determining the minimum circulating subarea of initially planed observation system; choosing a common central point trace gather deeply buried in a target layer; extracting corresponding model trace gather; weighting and stacking to obtain stack response of a surface element; solving the average amplitude value in the minimum circulating subarea and the amplitude standard deviation in the minimum circulating subarea; comparing the amplitude standard deviation so as to determine the advantages and disadvantages of the observation system; and choosing the observation system. According to the method, the amplitude standard deviation of the stack response is utilized to choose the observation system, so that illusion due to vision judgment is avoided, collected footprint due to the improper choose of the observation system is lowered, and signal to noise ratio and fidelity of seismic data are improved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Inversion method and system based on earthquake dominant frequency

The invention discloses an inversion method and system based on earthquake dominant frequency. By means of the method and system, an intra-platform shoal reservoir can be effectively recognized. The method includes the first step of obtaining original earthquake pure wave data and well logging and geological data, carrying out reservoir calibration and earthquake response analysis on the data and obtaining reservoir earthquake response characteristics, the second step of carrying out spectral analysis according to the reservoir earthquake response characteristics to obtain reservoir spectral characteristics, the third step of obtaining earthquake single-frequency data cube according to the reservoir spectral characteristics by means of the frequency division method, the fourth step of carrying out reservoir tuning frequency analysis according to the earthquake single-frequency data cube and reservoir calibration to obtain a reservoir dominant frequency band, the fifth step of carrying out band-pass filtering on the original earthquake pure wave data according to the reservoir dominant frequency band to obtain earthquake pure wave data corresponding to the reservoir dominant frequency band, and the sixth step of carrying out wave impedance inversion on the earthquake pure wave data corresponding to the reservoir dominant frequency band to obtain wave impedance data, and recognizing the reservoir by means of the wave impedance data.
Owner:PETROCHINA CO LTD

NExT/ARMA-based structural response analysis method

The invention relates to an NExT / ARMA based structural response analysis method and a technology for modal parameter identification through structural vibration response, in particular to the technology for modal parameter identification of the structure by directly utilizing structural response under ambient excitation. The method is characterized by first detecting the structural response under ambient excitation; then utilizing NExT to convert the response signal to the damped free cross correlation function; and subsequently using the cross correlation function as the input data and identifying the modal parameters (frequency, mode vectors and damping ratio) of the structure by applying the ARMA time series model. The method can better handle the non-linear and astable response signals with multiple degrees of freedom under non-free vibration, and modal parameter identification, can be applied to signal processing and modal parameter identification in such fields as civil engineering, aerospace, autocontrol, mechanical engineering, bridge engineering, hydraulic engineering and the like, has the capabilities of improving the signal to noise ratio of the data and resisting interference and has the characteristic of more accurate modal parameter identification.
Owner:FUZHOU UNIV

Wind turbine generator dynamic response analysis method based on multi-platform co-simulation

InactiveCN108694277ASimple structural designUncovering Coupled Operating CharacteristicsEngine fuctionsMachines/enginesElement modelMulti platform
The invention discloses a wind turbine generator dynamic response analysis method based on multi-platform co-simulation, and belongs to the technical field of wind turbine generators. Aiming at structural components of a wind turbine generator, 3D solid modeling is completed through a Creo platform, and a Creo model is imported into an ABAQUS finite element platform. According to the actual working conditions, the correct constraint relationship of each part of a finite element model of a whole unit in the ABAQUS is set, and simulation is conducted to obtain the intrinsic frequency and mode shape of an impeller assembly and the whole unit. Coupling response between the inside of the unit, that is, between an impeller and a tower, is discussed through response simulation, the natural vibration characteristics of key components and the whole unit are studied by using a finite element simulation method, the dynamic response characteristics of the wind turbine generator are obtained by using time-varying wind pressure distribution as the main excitation load, the wind turbine generator dynamic response analysis method based on multi-platform co-simulation has significances to improvingthe structure design of the unit and formulating effective diagnosis strategies.
Owner:BEIJING UNIV OF TECH

Systems and methods for multiple winding impulse frequency response analysis test

The winding testing unit provides systems and methods for determining normal and / or abnormal characteristic signatures of same-voltage windings residing in a device, such as transformer, without the need for a comparison to past historical data. A plurality of characteristic signatures [H(f)'s] are determined for each of a plurality of windings. A plurality of differential characteristic signatures [H(f)'s] are then determined from a plurality of H(f) pairs selected from the plurality of H(f)'s. The differential H(f)'s are compared and at least one significant asymmetry is identified between the differential H(f)'s.
Owner:GEORGIA TECH RES CORP
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