Topology Optimization And Finite Element Analysis Of DL4100Vehicle

Semitrailer tractor is one of the important models in the logistics market, it has high transport efficiency, security and other advantages, and is being studied rejection linked to the relevant laws and regulations of the mode of transport, so the current tractor development prospects bright. As one of the important parts of the tractor frame, its performance is good or bad direct impact on the tractor vehicle performance. Frame main function is as a platform tractor parts connect, plays the role of the the vehicle "skeleton". Tractor frame is a hot field of academic research for commercial vehicles. Especially in our country existing under the relevant legal provisions on the governance of the overrun ultra the tractor frame research more urgent.The research direction of the tractor frame two:the first aspect of the study is its innovative design method, the optimal design theory has developed rapidly, many new design method ideas. The second aspect is how to further reduce the quality to meet the normal requirements of the premise, so that the frame so that the frame. In this paper, these two aspects of the main study.In this paper, the frame of a tractor models re improved design, the final validation of the new design of the frame than the original frame based on the finite element analysis results have improved in all aspects of performance. In this paper, based the hypermesh software platform frame the following four parts:1) First using optistruct modules to research on frame design, using the original frame parameters to establish the initial topology optimization model. Application of variable density method topology optimization theory, frame strain energy minimization as the objective function, the frame volume than as constraints on the frame conditions of topology studies, and eventually get in density threshold set the0.3topology optimization results, this result reflects the distribution of frame materials.2) Topological distribution results according to the frame material using UG frame3D modeling work has taken the form of a variable cross-section stringers, and the original frame beams decrease from6to5, further reducing the original the weight of the frame. In addition, the process flow variable cross-section stringers with a brief introduction.3) The finite element model of the newly created frame, and discuss the key parts of the simulation, finite element model of the process of establishing finite element analysis model, through the analysis of the results of the comparison show that the redesigned chassis performance statics indicators and vibration characteristics has been improved significantly.4) Consider the design of the lightweight trend to the tractor frame, frame new design lightweight processing using size optimized to achieve the purpose of weight reduction. The size of the thickness of the frame components optimized, the final lightweight frame is8.7%lower than the weight of the original frame, to reach a lightweight purpose. Last frame of lightweight static analysis results show that the bending conditions stress appeared to increase to reverse the conditions reduce stress, but both are still lower than the yield limit of the material, instructions lightweight after the mechanical properties of the frame is still in line with the conditions of using.