Lightweight Design For Independent Suspension's Key Components Of The Terrain Vehicle

The purpose of mechanical structures and mechanical components optimization design is to make designed structures who have lighter weight,smaller volume,more efficientness,lower cost,better reliability and so on. But mechanical structures are often complicated ,the results are not good using traditional experience formula method to optimize mechanical components.However,with the rapid development of computer and numerical value method,some engineer problems whatever are simple or complicated can be resolved by discretized numerical value method and computers. Finite Element Method ( FEM )is not only one important numerical value method,but also supplys a platform for structure analysis. As one way of structure optimizations for the topology optimization ,because this method is very important during primary period of products design,in recent years people pay more attention on the technology of topology optimization design.Firstly,this paper introduces the history of topology's development.Basing knowing about the concept and the elements of topology and structure topology optimization design,learning Hyperworks software,we study density method topology principle based on Finite Element Method in detail. In this paper,we use the asway nether arm and the single arm of the independent suspension provided by the manufacturers as geometry models of topology design. First we simplify itsstructure, divide its finite element on the basis of the simplified structure,and then get the finite element model which is satisfying in the end. Furthermore, all the finite models based on the high-precision pentahedral elements and hexahedral elements. Then through the applied load , defined restriction, we can optimize its design, enduce its topology optimization schemes. Accoording to the topology optimizitation of the model, we redesign geometry models of the asway nether arm and the single arm, obtain the bran-new geometry models of the asway nether arm and the single arm. In this paper, to validate the rationality of the new design of the geometric model, we firstly carry on the finite element modelling to it, and then recarry on the analysis situs optimization computation under the same situation, obtain the redesign of the asway nether arm and the single arm's stress distribution map. Through the contrast of strength, stiffness and displacement, we can conclude that the redesign is rational.We simplify the asway nether arm and the single arm's structure,divide its finite element on the basis of the simplified structure,and then get the finite element model which is satisfying in the end;In the ADAMS software, through moving the dummy entire vehicle model, obtain the exterior loads on the asway nether arm and the single arm during the cross-country is running, and then analysis the restriction on the asway nether arm and the single arm during the entire vehicle is running.On the basis of divide the asway nether arm and the single arm's finite element, through define the condition of boundaries, setup the parameters of optimization, compute, obtain its topology optimization schemes. Secondly, introducing the bring of topology optimization technique. Bases on the topology optimization schemes, the stress distributing and manufacture in thepractice, we redesign the asway nether arm and the single arm.Divide the redesigned asway nether arm and the single arm's finite element, and run the topology compute over again according to the same condition, obtain the stress distributing maps of the redesign asway nether arm and the single arm.Finally,according to contrast the capability of the redesign asway nether arm and the single arm with original structure, validate the rationality of the redesigned structure. The result is that the redesign asway nether arm and the single arm's mass individually decrease 15.74% and 12.78% in the case that its intensity,hardly is satisfied.