93 results about "Crash simulation" patented technology

A method predicts trajectories of traffic objects to avoid collisions. The method estimates the probability for at least two traffic objects to collide, and predicts a potential movement of the traffic objects presumably involved in the collision after the collision. This information about a potential movement of the traffic objects can be used to plan a suitable trajectory path of an evasion manoeuvre for a host-vehicle employing the method. A system detects the collision situation and applies crash situation models to predict the future dynamic properties of other traffic objects that collide or are about to collide with each other. The method and system applies specific crash models like collision models, models derived from crash simulations and tests or models of human reactions in emergency situations.

Embodiments of a crash simulator sled assembly are disclosed. The crash simulator sled assembly can include a sled, an element movable relative to the sled, and a force element, such as a damper assembly or actuator assembly, coupled to the element. A second sled can also be connected to the element. The damper assembly can control relative movement of the element relative to the sled, while the actuator can develop force to replace force attributable to mass. This provides advantages for more efficient and effective test crash simulation and research.

This invention relates to a kind analytical procedure of automobile collision multifunction emulation and removable counterguard. The invention includes: found removable counterguard model; define removable counterguard's car frame, tyre, subpanel as rigid body of nonoccurrence distortion and relative displacement; build removable counterguard's upper and down beehive absorbing model on described subpanel, and set the correlative size of removable counterguard as specific model parameter; carry in real vehicle parameter corresponding to removable counterguard's model parameter; thereby utilize state removable counterguard to emulate need measuring vehicle to carry out vehicular different kinds of collision test analysis. This invention can advance computational accuracy and analyses reliability, and advance calculation astringency and short calculation time.

The invention discloses an automobile energy absorption box based on negative poisson ratio structure filling and a multi-object optimization method thereof. An energy absorption box body (2) is filled with negative poisson ratio filling inner cores (3) with an inner sunken hexagonal negative poisson ratio structure, wherein deformation induction grooves are designed on the energy absorption box body (2). The energy absorption box body is connected between front protection transverse beams and front longitudinal beams. Through mechanical properties uniquely owned by the negative poisson ratio structure, a stress deformation state during automobile collision is improved, and the energy absorption effect is reinforced, so that safety of passengers is improved, and maintenance cost is reduced. Meanwhile, the invention provides a multi-object optimization scheme aiming at the novel structure; through parametric modeling of the energy absorption inner cores, an energy absorption outer shell and a surrounding structure, on the basis of the Hamersley experimental design, the structure is subjected to crash simulation, a model approximating a response surface is obtained, and finally optimal design parameter combination is obtained on the basis of multi-object optimization of imperial competition algorithm; and the process can be applied to the development process of actual industrial production, reliability is improved, and the development time is reduced.

The present invention relates to an experiment system and a method for simulating collision between automobile and parapet. The system includes hoist connected via elevating mechanism to the tail unhooking mechanism of model automobile; model automobile with head hook connected to drawing steel cable, which is parallel to the pressure guide steel cable with ends fixed in two ends of the guide slot and has the other end connected to weight drop hammer via pulley block; guide rack to guide the model automobile; guide rack stopping block in the unhooking position of the model automobile; high speed camera installed in the camera tower; and acceleration measurer in the model automobile. When the drop hammer falls to sand surface, the stopping block makes the drawing hook in the guide mechanism separate from the model automobile.

The invention relates to a finite element modeling method for the welding line of a soldering board based on vehicle crash simulation, belonging to the vehicle computer-aided design technique field, comprising the following steps: first, baseplate modeling, which comprises baseplate hard spot arrangement, baseplate reseau partition, and baseplate reseau translation; second, building a double-beam welding line model, which comprises space nodes arrangement, a double-beam manufacturing, and connection of the beam and baseplate; third, the attribute assignment of the double-beam unit, which comprises the attribute assignment of beam unit material and the attribute assignment of the beam unit section; fourth, moving the built welding line model of the soldering board and the baseplate reseau model into an impact finite element computational model. The invention considers the material attributes of the welding line, as well as considers the shape of the welding line, can accurately simulate the deformational behavior of the welding line in crash simulation, enhances the simulation accuracy of vehicle crash, is rapid and effective, and is easy to master technicist.

An automobile collision simulation trolley device comprises a trolley and a track. The trolley comprises a linear sliding table sliding along the track linearly and a deviation platform for fixing a testing trolley body. A hinged structure is arranged between the linear sliding table and the deviation platform. The hinged structure is arranged in the middle of the deviation platform, and a deviation power source for pushing the deviation platform to rotate is arranged between two ends of the sliding table or two ends of the deviation platform. The automobile collision simulation trolley device relates to an automobile passive safety test detecting device, solves the problem that testing data obtained by the existing simulation trolley test can not reflect a dynamic process related to vehicle body deviation motion during collision of an automobile, and provides a good testing searching device for designing and manufacturing the automobile with good safety performance.

The invention provides a vehicle crash simulation test apparatus which enables reproducibility to be improved. In the vehicle crash simulation test apparatus, a sliding vehicle (15) that allows a to-be-test body (16) to be carried is supported to freely move back and forth along a horizontal direction, and a pedal (22) is supported by the front portion of the sliding vehicle (15) to freely rotate. In addition, acceleration can be applied to the pedal (22) by an emission device (23) serving as an acceleration device. The components of the pedal (22) and the components of the emission device (23) are configured in a way that the central position on the left and right directions of the sliding vehicle (15) is arranged to be a gravity position.

A method is provided for simulating a vehicle crash on a fuel delivery module of a vehicle. The fuel delivery module (11) has a flange (10) constructed and arranged to be coupled to a fuel tank, a fuel pump (12) for delivering fuel from the tank and through the flange, a reservoir (18) housing the fuel pump, and strut rods (14). Each strut rod has an end coupled to the reservoir or fuel pump and another end coupled to the flange at an interface. The method models a fuel tank associated with the fuel delivery module as a rigid or elastic shell. A solid model of the fuel delivery module is created. The solid model is meshed to create a finite element model. Fluid in the fuel tank is modeled with Lagrangian or arbitrary Lagrangian Eulerian finite elements, or smoothed particle hydrodynamics particles. Solid fluid interactions are added to the meshed solid model. A vehicle crash simulation is run on the solid model together with the fluid interactions to determine the effect of the fluid interactions on the interface of each strut rod with the flange and to determine any effect on the flange.

An acceleration pulse modulation method for HYGE-type crash simulation sleds uses servo-controlled accelerators on moveable parts of the crash simulator components and acceleration measurement instrumentation for comparison of measure acceleration of the sled with a desired acceleration to enable dynamic adjustment of the total accelerating force applied to the sled via servo-controlled accelerators, based upon measured acceleration error in order to eliminate acceleration error.

The invention discloses a nonlinear topological optimization method for car body welding spot arrangement. The method comprises the steps that a vehicle crash simulation finite element model is established, LS-DYNA calculation is submitted, and displacement values of crash performance key attention nodes are output; a white car body linear rigidity simulation finite element model is established, and GENESIS optimizing calculation is submitted; entity units are adopted for modeling of relevant welding spots in a crash model and a white car body model; an equivalent static load method is adopted for transforming crash nonlinear conditions into linear static conditions for topological optimization design; the welding spots are set to be topological variables, obtained welding spot density values are updated into the crash finite element model, and a new round of crash simulation analysis is conducted; lastly, a convergence result is postprocessed. According to the method, the entity welding spots are subjected to topological optimization, car body welding spot arrangement is realized on the premise that crash properties at all important moments are met, reasonability of car body welding spot arrangement is ensued, redundant welding spot arrangement is avoided, the number of the welding spots is reduced, manufacturing cost is lowered, and production efficiency is improved.

A method of simulating a vehicle impact that involves generating a first finite element model of the vehicle, a multi-body model, and a partial vehicle finite element model. The method also involves generating a coupled model that includes at least a portion of the multi-body model and at least a portion of the partial vehicle finite element model. Additionally, the method includes running at least one impact simulation with the coupled model to thereby identify the effects of the impact on the vehicle and/or the occupant.

The invention discloses a laser light curtain blocking type speed measuring system for measuring light-gas gun millimeter-level bullet speed and belongs to the field of ground superspeed crash simulation experiments. The problem that an existing light-gas gun millimeter-level bullet speed measuring method is low in accuracy and low in success rate, repeated tests are needed, and accordingly testing cost is high is solved. The system comprises a laser velocimeter, a laser emitting device, a laser light curtain receiving device, a speed measuring signal display device and a speed measuring channel. The outlet end of a light-gas gun bullet launching device is connected with the speed measuring channel, the laser emitting device and the laser light curtain receiving device are arranged on the opposite faces of the speed measuring channel, a speed measuring signal output end of the laser light curtain receiving device is connected with a speed measuring signal input end of the laser velocimeter, and a display signal output end of the laser velocimeter is connected with a display signal input end of the speed measuring signal display device.

The invention discloses a finite element explicit parallel solving and simulating method based on a graphic processing unit (GPU). The method comprises the following practicing steps: 1) data is read into a host memory; nodes and units in finite element calculating model data are recognized through a host central processing unit (CPU); the ownership between the nodes and the units is searched and stored, and the finite element calculating model data is read into a GPU global memory; 2) a GPU executing parameter is set; 3) data stored in the GPU global memory is read through the GPU, the node acting force of each node is calculated through a multithreading method according to the GPU executing parameter; and 4) the calculated result is selectively output; CPU determines to quit or return to execute step 3) according to the convergence and judgment conditions. The finite element explicit parallel solving and simulating method is quick in operation speed, low in calculating cost, low in hardware cost and simple and convenient to use; particularly, the method is applicable to the dynamic nonlinear calculation of physical fields including sheet forming simulating optimization, automobile crash simulation and the like..

The invention discloses a whole vehicle crash simulation analysis method of a railway vehicle based on a spline curve. The method comprises the following steps of: determining the equivalent total rigidity of energy absorbing devices among railway carriages according to energy absorbing characters and serial/parallel connection situations of energy absorbing elements; establishing a mechanical model of a whole vehicle crash multi-degree-of-freedom vibration system; and establishing a whole vehicle crash dynamic property analysis model suitable for nonlinear multibody dynamics and based on thespline curve. According to the method disclosed by the invention, a nonlinear finite element and the nonlinear multibody dynamics are combined for carrying out research on whole vehicle crash simulation; and the established model can be used for well simulating the nonlinear and elasticoplastic deformation of materials and meanwhile expanding the crash simulation analysis of a head vehicle is expanded to the whole vehicle, so that simulation prediction is carried out on movement and longitudinal load of each railway carriage during the whole vehicle crash.

The invention provides an ocean platform floatover installation impact simulation analysis method. Impact force simulation is finished through existing large analysis software ANSYS/AQWA, structural modeling capacity, large floating body water power analysis capacity and mooring system coupling power analysis capacity of powerful existing software is fully utilized, and rapid simulation and analysis of impact force between a floatover installation barge and a jacket are effectively achieved. According to the ocean platform floatover installation impact simulation analysis method, rigid impact force can be rapidly and accurately simulated in the floatover installation process, and the method provides a scientific basis for floatover installation design of an ocean platform. Through the change of a stress-deformation curve of fenders, other types of impact simulation problems can be also analyzed, and high application value is achieved.

The invention discloses a motion simulation implementation method and system for the collision processes of dynamic race cars. Collision simulation modules are integrated in the dynamic race cars and mainly comprise collision parameter solution algorithms and collision parameter mapping algorithms. By the adoption of the collision parameter solution algorithms, according to the instantaneous poses and the motion states of different virtual race cars before collision in a game motion scene, instantaneous pose and kinematics parameters of the virtual race cars after collision are acquired; on the basis, according to the weights, the heights and the like of game players, the largest elevation angle, the largest rolling angle and the largest lateral swing angle generated by the game players of the virtual race cars are acquired; the angles are then mapped to the largest motion angles of motion mechanisms in game motion simulators of the dynamic race cars through different mapping parameters, so that the collision processes of the different dynamic race cars are simulated through the game motion simulators of the dynamic race cars conveniently, and different dynamic collision experiences are given to the different game players effectively.

The invention discloses a method and a device for simulating an automobile collision complex curve, aiming at overcoming the defect of the prior art and providing the method and the device which have simple structure and convenient installation and can simulate the automobile collision complex curve. In the method, a metal pipe can be expanded by a collision bar to generate expansion deformation when the metal pipe is subjected to the action of the collision bar with the diameter greater than the internal diameter of the metal pipe, energy is absorbed by expansion to slow down a trolley, and a required wave curve is generated. The device comprises a barrier wall, the trolley and an energy-absorbing component. When the simulating trolley collides with the barrier wall, the trolley collides with the front end of the collision bar; and when the collision bar is collided into an expansion energy-absorbing pipe after being stressed, the impact energy of the simulating trolley is absorbed in the process of expansion, thereby one resistance is provided to the simulating trolley, and different resistances enable the simulating trolley to generate different collision simulating curves. The invention is used for inspecting and developing the safety components of the automobile and simulating the collision of the real automobiles.

A method of and an apparatus for performing a collision simulation on a two-wheeled vehicle using a virtual model of a dummy developed for use on four-wheeled vehicles.

The invention belongs to the technical field of helicopter designs and analysis, and relates to a full-helicopter anti-crash hierarchical simulation method. The full-helicopter anti-crash hierarchical simulation method comprises the following steps: using a finite element analysis pre-processing software Patran, and respectively establishing a flexible landing gear simulation model, a helicopter fuselage rigid material model and an anti-crash seat rigid material model, then using a transient dynamics analysis software Dytran to carry out helicopter crash simulation, and then removing a landing gear model, using the finite element analysis pre-processing software Patran, changing the helicopter fuselage rigid material model to a fuselage flexible model, then removing a fuselage model, using the finite element analysis pre-processing software Patran, changing the seat rigid material model to a flexible model, and finally completing the full-helicopter anti-crash simulation. The full-helicopter anti-crash hierarchical simulation method disclosed by the invention uses a method of combination of the rigid-flexible models and hierarchical processing, thereby being capable of greatly reducing the required simulation time, lowering the analysis cost, meeting the precision requirement and accurately simulating helicopter crash gestures.

The invention provides a combination mirror collision and reliability comprehensive test platform. The combination mirror collision and reliability comprehensive test platform comprises a comprehensive test platform, a hydraulic system and a measure and control system, wherein the comprehensive test platform integrates functional modules such as a retraction jack, an operating handle simulation mechanism and a head collision simulation device, the retraction jack is used for converting the swinging of a combination mirror to the continuous rotation of a driving module, the retraction times and the mechanical variation can be recorded, the collision process of a driver can be actually simulated, the kinematics and dynamics parameters of the entire process can be recorded, and an experimental foundation can be set for researching the reliability, the injury degree and the man-machine system engineering; the hydraulic system drives a head module to collide with the combination mirror at a given speed and acceleration, and the driving acceleration and the collision speed are controllable and adjustable; the measure and control system is used for controlling the test platform in real time, the entire test process is observable, measurable, controllable and adjustable, relevant actions of the driver can be actually simulated, the kinetics and dynamics parameters of the test platform can be collected, the video information can be collected in real time and analyzed in real time, and the control system has advantages of high humanization, high integration and the like.

The invention provides a car crash simulating trolley device. The trolley device comprises a fixing guide rail which is horizontally arranged, a trolley which is glidingly arranged on the fixing guide rail, and a pneumatic assembly which supplies a positive driving force to the trolley to push the trolley to horizontally move, wherein the pneumatic assembly is arranged at one end of the fixing guide rail. The trolley device particularly comprises a hydraulic assembly which provides a reverse driving force to the trolley, and a servo control system which is connected with the pneumatic assembly and the hydraulic assembly; the pneumatic assembly and the hydraulic assembly are sequentially arranged along the length direction of the fixing guide rail; the servo control system is used for controlling the pneumatic assembly and the hydraulic assembly to respectively provide a positive driving force and the negative driving force to the trolley. According to the trolley device, the pneumatic assembly is controlled to provide a constant positive driving force, and the hydraulic assembly is controlled to provide a variable negative driving force; therefore, the combined force of the pneumatic-hydraulic assembly is utilized to generate a positive acceleration to realize the accurate control of a shock wave.

The invention discloses a testing and calculation method for determining a material scale distance effect curve, and particularly relates to the test-piece measurement node arrangement and output, true stress strain calculation, processing of true stress strain curves under different scale distances and scale distance effect curve drawing. Accordingly, by developing detailed technical processes for the uniaxial tensile DIC test, the specific technical requirements that the number of grids arranged in the width direction of a test-piece is twice the width are made, it is guaranteed that integerscale distances ranging from 1.0 mm to 10 mm are obtained physically, the technical objective of obtaining a scale distance effect curve to be used for setting material failure parameters in a material equivalent strain failure model is achieved, and the complexity of the problem of failure of vehicle crash simulation materials and material test cost are significantly lowered; therefore, the method has the important theoretical and engineering practical significance.

The invention discloses an anti-crash design method for a helicopter fuel system. The anti-crash design method for the helicopter fuel system comprises the following steps of 1, building a fuel systemsimulation model, wherein the fuel system comprises a fuel tank cabin, a soft fuel tank, fuel or water, easily broken connecting pieces, an accessory plate and protective foam; 2, setting parametersof unit materials according to actual parameters of the materials; 3, performing boundary and contact definition; and 4, through comparison of a calculation result and a test result, correcting basicparameters of an anti-crash simulation analysis finite element model of the fuel system. According to the anti-crash design method for the helicopter fuel system, the workload of anti-crash testing ofthe helicopter fuel system can be greatly reduced; the design cycle is shortened; and huge economic benefits are generated.

The invention discloses a pendulum type automobile instrument collision test device.The device comprises an instrument fixing module, a signal simulation module, a collision generation module and a shooting device.The instrument fixing module is used for fixing an automobile instrument; the signal simulation module can simulate and generate different test conditions of automobile speeds and engine revolution speed signals and drives the instrument needle to rotate; the collision generation module comprises a swing arm and a mass block and is used for simulating different levels of collision energy, and collision simulation of the automobile instrument is realized; the shooting device records the needle indication conditions before and after collision of the automobile instrument.According to the pendulum type automobile instrument collision test device, collision simulation test can be performed to automobile instruments in all kinds of actual operation, the needle indication problems of the automobile instruments can be studied in the automobile collision process, various test conditions can be realized by the device, and the device is applicable to all types of automobile instruments.