CAE develops medium application in the car

Time:2023-06-21 12:29:05
Click:47
source:DDON CNC Machining

Development of 1 introductive and contemporary car is go against a process integratedly with analytic each other. The different level that develops integratedly in car product with the analysis, produce distinct effect, design the development technological process of detailed design from the concept, actual it is one arrives integratedly from the system the flow of systems analysis. Developing level initial stage, sufficient design is spent freely, but the parameter of concerned design, data is less, what we pay close attention to is the integral function of the product, for example: Ride comfort, operate stability, use Nasran software, it is good that we can combine set of feedback of opinion of test data, client in design initial stage truckload design function index (design an object) ; In detailed structure design phase, the basis is truckload function index, chase class to decompose each subsystem such as automobile body, batholith, component to go up, reflect each design parameter in the structure finally to go up. 2 cars structure designs a process domestic products plan is more integrated now already had resource, optimize configuration, more the integral function of intensity product, for instance ride comfort, operate stability, of high end in truckload NVH respect has higher demand. No matter be commercial vehicle still is multiplied,use a car, automobile body design is contemporary and truckload all the time the core technology of the design, finite yuan of action Yuan Chao that designs play in automobile body is too other respect, introduction of software of IDEAS CAE of later development union, Nastran is finite the different motive of each yuan of level play that design in automobile body. 2.

1 truckload the ride comfort of function design car basically is to show the vibration that maintains a car to arise in travel process and concussion environment are right the effect that takes a comfortable sex, it is one of main function of contemporary speedster. Studying a target basically is truckload truckload and axle load of suspension system, around, inertial quality, the unit library with the pre-treatment interface that uses IDEAS CAE human nature to change and substantial Nastran, can be in notional design phase is fast, accurate build much freedom to spend truckload with dynamical system model, undertake mode, transient state is answered, answer an analysis randomly, right truckload the response of systematic ride comfort, human body make evaluate; Opinion of feedback of client of combinative experiment, in advance, professional personage is subjective evaluation, establish design goal, coach succeed structure is designed. The SOL 200 that uses Nastran to offer seeks solution array, can be design variable with the stiffness of suspension system, damp, to each frequency according to the requirement of national Organization for Standardization Duan Pin is led undertake adding counterpoising optimizing, the design gives coefficient of stiffness of suspension of around of ride comfort first-rate, damp. Finite computation of yuan of model, part sees figure below as a result. Graph 1 truckload 5 freedom spend a model to pursue 2 truckload mode distributings 2.

Structure of 2 automobile body is designed 2.

1 automobile body connect of sectional, joint design (Joint) with bridge (Beams) it is a decision truckload the main factor of stiffness and global mode, they are being controlled truckload the Boom of low frequency and vibration (Shake) ; Sectional character (Section Property) the character that decided bridge. Accordingly, pass characteristic to sectional appearance, ply and structure analysis, in car concept design phase, of preliminary estimation and car of model of evaluation surveyor's pole basically bear the weight of of the structure defy a turn, fight the quantity that roll a model, sectional area, improve the direct import with having important to the design of truckload component and structure. IDEAS CAE provided substantial sectional library, in the meantime, a surname that allows an user to build aleatoric figure is sectional, the basis leaves the sectional property of form calculation bridge: The bridge in graph 3 Ideas is sectional the bridge in 4 Ideas of computational formula graph is sectional the bridge in computational graph 5 Ideas is sectional computation 2.

Design of automobile body of analysis of mode of 2 frame, automobile body should satisfy automobile body stiffness and intensity to design a requirement. Stiffness is insufficient, hatch of the door window that will cause automobile body, engine happen be out of shape, bring about glass broken, door gets stuck dead to wait for a phenomenon; In the meantime, low stiffness accompanies low natural frequency necessarily, easy happening structural resonance and noise, affect a person take comfortable sex. Use Nastran SOL103 to undertake mode of antrum of structure, sound seeks solution, can designing frequency of whole of system of initial stage identifying, local mode, vibration shape; Union is truckload design a requirement, make to the interaction between each different frequency, subsystem evaluate, adopt the frequency of the system of distributinging automobile body with appropriate politic and sound design thereby; At the same time the basis is calculated result, the place of indoor to the influence noise, considering target of condition of cost, installation, design choose right damp stuff, achieve decrease bestly brace up, fall purpose of a confusion of voices. Contemporary automobile body increases thin board with framework component coadjacent, form bear the weight of of the structure " network " , each other depend on each other is put between them. Automobile body design emphasizes bearing the weight of very structural rationality, get static force or the power that get change no matter, itself wants bodywork to be out of shape harmoniously partly each, without particularly weak link. Use mode analysis, can help design engineer define automobile body weak point, fall circularly in least design, find reasonable improvement measure. Use the IDEAS CAE software of UGS, can imitate solder nods connection, it offers CWELD of general method of two kinds of imitate and ACM2, and solder is nodded generate have nothing to do with reseau, can realize a design easily to change and need not make solder point afresh. Its are finite the mode of outfit tubing manage of yuan of model, OK and convenient implementation is three-dimensional CAD data and CAE are finite yuan of correlation of the model, when three-dimensional model geometry, fixed position happening is changed, want a dot to take only finite yuan assemble update, need not weigh head redo, improved work efficiency. Graph structure of 6 frame, automobile body is limited graph of yuan of model mode vibration shape antrum of sound of 7 automobile body is restricted vibration shape passes yuan of model mode analysis of mode of antrum of sound of automobile body structure, automobile body, can discover the coupling between both concerns, for automobile body NVH the design is offerred how-to; Through mode of automobile body, frame the analysis can be automobile body hang set buy to decorate provide guidance. Intensity inadequacy causes automobile body compose to build inchoate occurrence crackle and fatigue fracture. Use Nastran SOL101 to undertake intensity is analysed, change of the weak point that can discover automobile body component part ahead of schedule in design phase, stiffness is appropriate, quick implementation designs the contrast between individually, reduce the blindness that designs development. Graph intensity of floor of 8 automobile body analyses stress cloud atlas 2.

3 truckload and finite yuan the analysis is built in IDEAS CAE module truckload model, pass computation of intensity, stiffness, can discover each parts between, the drive of the force of each systems concerns, examine with design target whether conform to; Pass mode analysis, can discover the frequency between each systems distributings, coach NVH is designed. Combinative Nastran SOL200 can consider intensity of stiffness of mode, whole, crucial position to be opposite at the same time the design sensitivity of each components have consideration, below the premise that assures intensity, undertake design, component is optimized decreasing weighing. Graph company of field of 3 conclusion blessing passes cloud atlas of stress of analysis of intensity of floor of 9 automobile body to begin CAE to work in developing a process, raised a product to develop quality, shortened product development cycle, managing the product develops funds. Wraparound rise, the good point that uses CAE is as follows: 1, use the computer to assist a project (CAE) method, can be before car of sample, model, the function with imitate truckload even component and working state, the design that avoids a tradition to go up - trial-produce - test - improve a design - again of trial-produce repeat a process. The waste that reduced time to go up, shortened development cycle, reduced manpower, material resources and financial capacity to go up use up and the bring down develops fare. 2, home designs a section as three-dimensional design gain ground, to begin CAE the job laid a foundation, make begin at the same time the project becomes a possibility; In the meantime, CAE technology uses in developing a process, also changed CAD to undertake in development geometrical model is defined only, undertake in development functional design, function is designed at the same time. 3, CAE work is begun in product development process, the support experience in changing traditional design has the qualitative analysis, design method that lacks quantitative data, make the product decreases heavy, function to optimize become a possibility; In the meantime, use CAE to computation can try inside short time and compare more design program, obtain likely consequently relatively beautiful is best even design and improve development quality. CNC Milling