基于动力学仿真的节能车车架结构分析及优化设计

Structure Analysis and Optimization Design of Energy-Saving Vehicle Frame based on Dynamic Simulation

文章基于壳牌汽车环保马拉松大赛规则,利用Adams多体动力学软件对节能车整车简化模型进行动力学仿真,基于仿真结果获得车架“最恶劣”工况及其相应的载荷变化情况;再将此载荷加载于车架的有限元模型中,采用有限元方法分析车架应力应变情况;根据以上结果对车架进行结构优化设计。实验表明基于动力学仿真的结构分析能够真实地反映车架受力的动态变化情况以及危险点,为车架的设计优化提供理论依据。

This paper is based on the rule of the Shell ECO-Marathon and Adams multi-body dynamics software is used to carry out dynamic simulation on the simplified model of the whole vehicle.Based on the simulation results,the"worst"working conditions and the corresponding load changes of the frame are obtained.Then,the load is loaded into the finite element model of the frame,and the stress and strain of the frame are analyzed by using the finite element method.At the same time,the modal analysis of the frame is carried out to obtain the vibration of the frame in different frequencies According to the above results,the frame structure is optimized.The experimental results show that the structural analysis based on dynamic simulation can truly reflect the dynamic changes and dangerous points of the frame,which is closer to the reality and provides a theoretical basis for the design and optimization of the frame.