HyperWorks truck-based body of finite element analysis and improved

With the rapid development of automobile industry, computer simulation technology has been in the field of automotive design at home and abroad have a very wide range of applications, significantly improving the level and efficiency of automotive design. Finite element analysis and modern mathematical optimization theory based on a combination of virtual simulation and optimization technology, the modern body structure design as the main method, you can kind of car before trial, analog components and vehicle performance and working conditions, to avoid the traditional design - prototype - testing - improved design - and then repeat the process of trial and shorten the development cycle, reducing the human, material and financial resources consumption, the development of products more competitive. In this paper, a finite element model of the truck body for the study is to explore the mathematical optimization method in structural analysis and optimization of vehicle body design. This paper established a finite element model of the truck body, and the finite element modeling in the process of cleaning up geometry, mesh, weld simulation process a more detailed introduction.Then the body of the finite element model modal analysis and static analysis of bending stiffness and torsional stiffness of the static analysis, modal analysis by the truck body in the idling condition may occur due to engine excitation resonance, so the body's Elementary modal frequency to be optimized to improve. Chapter IV of this article describes in more detail in the optimal design theory and methods. And the optimization method with the size of the thickness body panels are optimized to increase the body effect of optimization elementary frequency and reduce the quality of the body. Then use the topology optimization and shape optimization methods for the design of covered items to the object body to further enhance the body's elementary modal frequency.Through this study show that the optimization method can play a variety of body performance optimization purposes. The selection of topics Altair's HyperWorks American family of software as a working platform for the text to the routine use of HyperMesh, OptiStruct, RADIOSS and HyperView also made a brief introduction. 

Key words white body; finite element; modal analysis; optimal design