The CAE application in car development and carry out

CAE shortened greatly the development of the product is periodic, hypostatic modelling and parameter are used to change in establishing model and analytic procedure, the modification of model and parameter is very convenient, decide logical structural parameter place needs time to get finally substantially shorten. 2.

Decreased to develop fare. Relative to at road test and indoor bench test character, use CAE to analyse a car truckload the fee that all sorts of function place that reach component need decreases considerably. 3.

Be helpful for waiting for a method to develop a property through optimizing more advantageous car is truckload with component. For example is reduced through optimizing the structural parameter of frame and automobile body truckload weight; Operate truckloadly through optimizing the parameter that walks to fasten and turn to a department to rise stability and travel ride comfort. Of course, for the angle from actual application, the play of car CAE action still relies on two fundamental premise. The adroitness that is pair of CAE technologies firstly masters, another is to should offer the basiccest test data and relevant database. The basic test data that indicates here, it is the mechanical character that points to all sorts of characteristic like tire data, road character data, material. Alleged and relevant database is to show the enterprise is in what accumulate ceaselessly in products plan and development process, can offer configuration and main parameter (include the price, outside assist the circumstance) database. Besides, should carry out CAE better and produce its effect, indispensible with CAD/CAPP/CAM, optimize the union such as the technology to rise try to be applied integratedly. The article basically introduces CAE to develop medium application to reach in car product specific carry out, mix to CAE and CAD, CAPP, CAM the relation that optimizes a technology tries to discuss. 2, CAE develops medium applied CAE to develop medium application in car product in car product range is very wide. Here tries to introduce with respect to the application of a few main fields. 1.

The analysis of structural intensity and stiffness is finite yuan of law because have taller computational precision,the respect is analysed in rigid structure intensity and stiffness and arrive to be used generally, be such more inside the linear limits of material stress meet an emergency especially. Additional, when the coincidence that considers mechanical stress and thermal stress, provided very convenient analysis measure like the large-scale software such as ANSYS, NASTRAN. (1) the intensity of frame and automobile body and stiffness analysis frame and automobile body are the structure in the car and get the part with more complex force, to bearing the weight of completely the car automobile body of type is more such. Frame and automobile body are finite the purpose of yuan of analysis depends on raising its carrying capacity and fight be out of shape ability, reduce its oneself weight and save stuff. Additional, whole car, after frame and automobile body weight are reduced, truckload weight also is reduced subsequently, improve the performance such as truckload dynamical sex and economy thereby. (2) of gear curving stress and gear of osculatory stress analysis is the uses generally transmission part in car engine and transmission department. Contact the analysis of stress through aging to gear the root curves stress and tooth flank, optimize gear structure parameter, raise gear bear the weight of carry force and service life. (3) the stress analysis of engine spare parts is with the crock lid of engine exemple, the action of body is enraged in its job project not only by the high pressure inside air cylinder, still can produce complex thermal stress. The crock builds craze incident to happen from time to tome. If be used only,be in in craze local strengthened idea tries to improve, cannot from go up at all solve a problem. Finite yuan the law offerred the fundamental way that solves this one problem. 2.

The applied safety of aspect of car passivity security, environmental protection and energy-saving it is the problem of 3 big heat that the car faces. How raise automobile body fighting collision ability is one of issues that the car needs to solve in passive security. Use finite yuan of imitate consideration that the law has car collision process, involve be out of shape greatly etc nonlinear problem, unlike general finite yuan of analysis. Because imitate calculation is OK and economic costly solid car impact test funds, and be being analysed in design phase imitate is only analytic measure, home, outside Motor Corporation uses method of this one party generally. The LSDYNA module in ANSYS software often is used to the imitate analysis that has car collision process. 3.

Kinetic emulation analysis introduces the car much style (rigid body and flexible system) kinetic analysis method has a car kinetic emulate, can studying level forecasts truckload kinetic performance, undertake optimizing to these function, improve product performance in order to achieve, shorten the development time, goal that reduces development cost. With operating truckloadly stability is exemple, because influencing factor involves tire, suspension, change direction wait for many respects, simple calculation gets logical conclusion hard, even if be qualitative conclusion often fluky also. For this, already developed a variety of mechanical kinetic emulation software. Be worth what carry is the ADAMS software of American MDI company, be used extensively undertake the car operates the trends of ride comfort of travel of stability, car is emulated. The TIRE module in ADAMS offers a certain number of planting when tire model offers an analysis, choose, with building the kinetic model of tire well and truly. The CAR module in ADAMS is to be a car only kinetic emulate and design, use very convenient. Home already had many Motor Corporation to used this software to undertake the kinetic emulation analysis of train of van, car, car and coach, obtained better result. 3, of CAE specific carry out and software introduction CAE analyses a method as a kind, can carry out alone, can use together with other CAX again. For example is finite yuan of analysis software, offerred commonly corresponding before, aftertreatment module, can use alone, but as compositive as CAD software use. Be opposite below finite analysis and yuan of machinery are kinetic emulated executive process and software make one simple introduction. 1.

Car spare parts is finite yuan of analysis process and finite yuan of software is OK and listed a few kinds finite yuan analytic business uses software. Here introduces to use most extensive IDEAS, ANSYS and NASTRAN in analysis of structure of car spare parts only. The IDEAS software of SDRC company is the compositive software that includes CAD, CAE, CAPP/CAM, PDM to wait inside. Entity builds model, network to differentiate, of load and tie bring to bear on, beg solution and aftertreatment to be able to be finished by the different module of this software. The ANSYS software of ANSYS company is special finite yuan of analysis software, before, aftertreatment and beg solution to also can be finished by this software. The NASTRAN of MSC company is finite yuan software has special before, aftertreatment software PATRAN. Its analysis process and IDEAS, ANSYS very much the same. Graph 1 build a model by Pro/E and differentiate what the above of cross axle model of reseau shows each company is finite yuan software can be finished independently finite yuan of analysis task. Of course, afore-mentioned all sorts of software still offerred the port with a variety of CAD software. Generally speaking, finite the function building a model of yuan of software is not as powerful as special CAD software. them only union rises use ability develops respective function better. When the author is analysing the flexural strength of cross axle of car gearing spare parts, adopted course is: The geometrical model that builds cross axle by Pro/E first finishs a network to differentiate, and with ANSYS file format. Ans exports a model, read in this model by ANSYS next and complete follow-up analysis. Graph 1 for Pro/E builds a model and differentiate the cross axle model of reseau. Of course, ANSYS also can read in Pro/E directly. Prt file, reseau differentiates reach finite the follow-up task of yuan of analysis is finished by ANSYS. Almost the geometrical model file that all CAD software can output IGES format, but the information that line knead dough contains only in this format, and the information that does not have body, and the meeting in IGES format file desertions partial information produces wrong geometry information even. Introduce a kind of method that solves this problem below: (1) the CAD/CAM software UG that uses UGS firm reads in the IGES format document that needs transition. (2) the model is revised in UG, use suture (namely Sewing) the command oversews all faces of the spare parts together, build hypostatic model thereby. (3) will hypostatic model is put into UG format. Prt file. (4) the pre-treatment software PATRAN that uses NASTRAN reads in UG to generate. Prt file, will get finite yuan of hypostatic model that the analysis requires. (5) finish by PATRAN and NASTRAN finite the other job of yuan of analysis. 2.

The application of mechanical kinetic emulation software in the car and finite yuan of analysis software is same, software of mechanical kinetic emulation analysis can be used alone already, also but as compositive as other CAX software use. In the car kinetic more software is being used in emulating is ADAMS and DADDS. It is with ADAMS exemple, introduce the measure of mechanical kinetic emulation analysis. When using ADAMS software to undertake an analysis alone, can build the much style model that needs an analysis with its AVIEW module, seek solution with its SOLVER module next. However, to make emulation analysis is able to undertake smoothly, often use a variety of software to work in coordination. It is will mechanical kinetic emulation software and CAD, FEM below compositive use a few profit: (1) use CAD software to build a model more convenient, accurate, generated figure is more realistic, dynamic emulation effect is better. (2) from inside accurate CAD model but more get accurate quality parameter conveniently, namely position of the quality of the spare parts, centroid, inertial quadrature. (3) the function that mechanical kinetic emulation software builds flexible system model is very finite, and use finite yuan of generate MNF that analyses software (mode neutral file) importable the accurate flexible system model that builds in mechanical kinetic emulation software. (4) although mechanical kinetic software can determine the mutual power concern between the spare parts and active force, but the stress that cannot analyse a spare parts, can have the aid of is finite yuan analytic software will finish. 4, the flow chart with the compositive graph 2 CAE of CAE and other CAX and compositive CAD knows from the analysis of above, want to finish CAE job better, CAE software and other CAX compositive use meeting achieves better result. As an example, build geometrical model by CAD software above all, by. IGES format or other form export the model, next by finite yuan of software and mechanical kinetic software read in geometrical model respectively. Finite the stress that finish, meet an emergency and mode analyse the node strength that yuan of geometry model that software builds according to CAD software and computation of mechanical kinetic software gain and output analyses a result. The model that place of mechanical kinetic software needs divides into two sort model: Rigid body model is obtained from CAD software; Flexible system model from finite yuan software is obtained (.

MNF format file) . Additional, if the model of certain part is generated by mechanical kinetic him software, the basis needs to be able to get quality parameter from CAD software. Mechanical kinetic emulation analysis writtens guarantee finally besides output outside fruit, the athletic concern that still can export a part and node force are offerred finite of yuan of analysis with. Cite the example of system of CAD/CAM of transmission of a car again. This system builds model, parameter to optimize by CAD geometry design, finite composition of yuan of analysis, CAPP/CAM. CAD software uses Pro/E, build a model by its geometry that finish and make model feature file. Parameter optimizes design module to read in model feature file, undertake optimizing to the structural parameter of transmission and performance data. In optimizing a process, call finite the intensity of spare parts of yuan of software ANSYS computation and stiffness. The model after optimizing returns Pro/E, finish CAPP/CAM job by it. CNC Milling