Car design develops medium CAE technology

In recent years, send rigid car security and environmental protection code to be in to car OEM manufacturer more time and cost respect raised taller requirement, introduce the computer to assist project technology in the round in car development process, implementation whole process, truckload fictitious prototype emulates class achieved reduce archetypal car experiment frequency, reduce production cost, shorten the target of cycle of new car research and development. The car is developed and made a technology cover course of contemporary and a lot of foundation and technical forward position, how realize car structure and component assembly to design and production technology, shorten car development cycle, reduce the cost, own innovation capacity that reduces car product to developed the element such as the risk to reflect a business directly. CAE technology can shorten greatly the design makes cycle, make weight, achieve optimization with makings, structure, cost. The applied range of CAE technology is extremely wide, the linear that includes component and assembly and nonlinear structure, oscillatory, inflectional, fatigue life, motivation is answered analyse and optimize a design; The heat such as cistern, fan exchanges function to analyse; Present analysis of function of aerodynamics of exhaust system, automobile body; Punch, forging, cast wait for process to emulate design with technological equipment. CAE technology solved new car successfully to develop the intensity such as medium exhaustion, life, oscillatory, noise and stiffness problem in car design phase, make design quality rises substantially. It is OK that its apply extensively help enterprise builds real product to develop ability, make the technical platform of modelling of car automobile body, design, production unifinication. The article introduces the effect that CAE technology amid produces respectively with respect to 3 phase of auspicious car products plan. Design of concept of notional design phase is the most important level in car design, a lot of truckload parameter decides in this phase. These parameter decided truckload the detailed design of structural dimension. As a result of the complexity of whole system, the experience that relies on an architect only cannot give out well and truly these data. Those who be based on CAE technology and data of a large number of experience and test is truckload it is OK that digitlization emulates a system imitate is truckload in differ to be answered actually below road condition, for the accurate CAE of each component the analysis offers load condition, undertake thereby complex nonlinear exhaustion of kinetic analysis, crucial part is life analysis, truckload NVH analysis. Graph the 1 pneumatic appearance that is notional automobile body analyses a scheme, will decide obstruction, lift, end sheds substandard form parameter and feature through this analysis. Graph the concept of pneumatic appearance analysis of 1 concept automobile body is designed (graph 2) the target fixed position that level determines whole car product, each are affirmatory and truckload, big assembly (for example system of automobile body, engine, batholith, control) performance data (graph the fictitious prototype of 3 concepts phase emulates an analysis, affirmatory batholith parameter and dynamic function) , make assignment certificate of each big assembly design, stipulate the design dominates data, the feasibility that finish considers to report. Rely on experience and model car experiment only, the design that cannot form complete science dominates index. Use CAE analyses the method that structure of drive automobile body devises, the rough analysis that all sorts of pair of plan intervene before the process is designed in detailed CAD, allocate the design such as intensity, stiffness, quality mensurably to dominate index, set collision security target and NVH function target, make clear the target of car trends performance. Notional design phase decided function of car whole structure, requirement architect has rich design and workmanship experience. Graph 4 to be based on the crucial point of notional automobile body stiffness is designed, determine shape of join stiffness, section. Graph the design method that the 4 keys that are based on notional automobile body choose stiffness design to analyse drive with CAE relatively the traditional design method that puts CAE work after CAD designs has the following advantage: In the design initial stage is based on what simple and easy CAE model can have structural property to optimize; Of the force in be being analysed through CAE deliver a form to be able to be in the structural data with design affirmatory and relevant initial stage asks with satisfying function, once designing the main section measure in the process and load method to be decided, stylist builds detailed CAD model with respect to the pattern plate that uses notional structure more easily, conduce to shorten development cycle. The CAE technology of phase of detailed design of detailed design phase has traditional application, support products plan, make sure the design satisfies intensity, stiffness, fatigue life, vibration to noise asks and design quality to dominate an end, achieve the goal that optimizes a design. The job of this one phase depends on the function target of the car, the key depends on building perfect analytic method and evaluation strategy, basically include to analyse content below: 1, the passive safety performance that the purpose that collision analyses depends on improving a product, through the front, flank, from the back, roll wait for all sorts of solid cars the imitate analysis of safety performance respect, the flaw of respect of product passivity safety performance discovers in time in products plan phase, put forward to improve measure, the code of respects of all sorts of passive safety performance that ensure the product sets in time through the country, all sorts of serious consequence that bad report reachs his to bring appear after preventing product throw on the market. How raise automobile body fighting collision ability is the issue that the car needs to solve in passive security. Fight collision function to affect a product directly final whether cast to the market. Fight collision function to consider at the same time to rise light quantified requirement, current car product uses armor plate of extra high strength and data of light qualitative alloy increasingly, be like aluminous, magnesium alloy. Graph 5 for framework of automobile body safety, be basically bear the weight of on automobile body structure. Graph 6 in expressing to touch a process in side, be opposite of B column be out of shape requirement. Graph 7 for truckload collision is emulated. 2, NVH function is evaluation car the main index of comfortable sex, matter to the market image of the product directly. NVH analysis conduces to the oscillatory frequency character of each subsystem in matching product structure, reasonable distributing the oscillatory frequency of each subsystem and vibration shape, in order to eliminate the coupling appearance in oscillatory process, the vibration that improves a product thereby is characteristic, reduce the noise of the product, raise the comfortability of the product. Intensity of the transfer function of the rigid body mode that noise, oscillatory analysis includes dynamical assembly, dot, dead load and trends are answered, BIW dynamic stability, truckload the stiffness frequency of each subsystem matchs etc. The country is at present immanent the research capability of this respect still more fragile, main reason depends on the inadequacy that the lack of test on means and data accumulate, the analysis that has not form a system is normative. The car of well-known trademark of the car of own brand and abroad competes, NVH function is crucial measure one of index. Graph the 8 acoustics contribution that state different frequency leaves different panel are measured. 3, before trial-produce of project model car, be based on theory of interconnected system of much more flexible system, solve design of car machine system and dynamic function optimize design problem, as a complete control car the system has analytic study, can build truckload kinetic model, be aimed at operate the function such as stability, ride comfort and sex of apply the brake undertakes trends of fictitious test site emulates an analysis, output a mark the diagnostic parameter of truckload and dynamic function, make optimize strategy. It can let design personnel control component structure parameter and truckload the relation essence rule of function, undertake forecasting to its function, feasibility studies and optimize a design. Traffic much system analyses content to include suspension vibration, car to hold certain property and comfortability to wait. Graph 9 express truckload maneuverability can be emulated, graph 10 represent suspension systems analysis. 4, fluid analysis basically considers car outflow field in auto industry of the design of intake of system of the air conditioning inside the obstruction to the car and lift, car, engine cabin medicinal powder of hot, braking system all medicinal powder heat, make an on-the-spot investigation truckload the appearance is fluent, whether can air conditioning system adjust quickly all place temperature inside the car, engine cabin and make rotor whether come loose heat is good etc. In products plan level can forecast the aerodynamics character of the product, ensure the product creates the demand of the aerodynamics when the design is being accorded with after coming out. Analyse test and verify and the effect that improve fluid and heat to conduct pair of product function through the hydrokinetics. Graph the 11 fluids that are air filter are analysed. 5, a product exhaustion life is contemporary design main index. It conduces to in advance discovering the problem of the intensity of product structure and fatigue wear respect, offer actor to change a solution to tall stress area. Through allocating all sorts of load in the structure reasonably, improve its thereby fatigue and fast performance, improve the reliable performance of the product. Fatigue life design needs to know the use environment of the product. Fatigue wear analysis includes pensile component intensity, door intensity, engine to build intensity, boot to build intensity to wait. What compete as the market is intense with each passing day, the life of the product becomes the main target that establishs product brand image. Graph 12 it is analysis of floor exhaustion wear. 6, strike out form emulates the producibility that conduces to affirmatory product, optimize punch direction, technology is complementary, preform estimation and platoon appearance. The quality blemish that it can forecast the likelihood in product punch figuration to appear in design phase (wait for) like corrugate, craze, undertake optimizing to products plan then, in order to eliminate figuration flaw. Because still be in products plan phase right now, the modification price of the product is the smallest. The application software with this mature part has the LS-DYNA of the DYNAFORM of ETA company and LSTC company. Because the metal on car automobile body enclothes a proportion that hold highest, ban gold mould cost is whole one of the biggest cost in production process. Process copy is the effective method that reduces percent defective to reduce manufacturing cost really. Graph 13 it is ply of board makings figuration reduces small plan. Phase of test and verify of project model car is before type approval project model car can use test and verify truckload whether does function achieve design goal, then is made further rectify and reform plan. Use CAE technology to conduce to a car light quantify the control that reachs production cost, decrease in great quantities rectify and reform a frequency, reduce experiment cost. The crucial and sensitive element that can search influence spy to decide function through the CAE model after demarcate, offer cogent and effective solution in the light of specific issue. Graph the 14 physics that are project model car experiment. Conclusion is current, it is mature that the CAE technology application in foreign auto industry has been mixed very extensively, mainer and mainer effect is being produced in process of new car development. According to statistic, use CAE technology to be able to make development cycle of automobile body mould shortens nearly 50% , accelerated plan of new car research and development greatly. Safe, environmental protection, energy-saving the 3 big themes that are contemporary car design. Our country's new automobile industry policy puts forward clearly: Encourage technology of own research and development to accumulate drag in research and development of car of new-style and energy-saving environmental protection. This must have capacity of stronger own research and development with respect to need car company. The application of technology of auspicious car CAE is faced truckload the whole process of development, the process is developed in the car (the concept is designed - detailed design - prototype test and verify - finalize the design production) in implementation whole process, truckload fictitious prototype emulates class, reduce number of archetypal car experiment, reduce production cost, shorten new car research and development is periodic. Rise as what CAE uses deepness and range, realizing the standardization that CAE works and system to change is the technical capability that promotes a business and market competition ability is strong assure. CNC Milling