轿车车身结构轻量化  

Lightweight of Car-body Structure

作　　者：张国胜[1] 周超[2] 崔海涛[1] 陈野[1] 

机构地区：[1]交通运输部公路科学研究院运输车辆运行安全技术交通行业重点实验室,北京100088 [2]中国石油四川石化有限责任公司,四川成都611930

出　　处：《公路交通科技》2012年第1期154-158,共5页Journal of Highway and Transportation Research and Development

基　　金：国家科技支撑计划项目(2009BAG13A04);交通运输部西部交通建设科技项目(2009318000043)

摘　　要：以某款国产轿车为研究对象,建立其白车身的有限元模型,并通过试制样车刚度、模态试验研究和有限元分析的对比,验证了计算机数值仿真分析模型的有效性和可靠性。在此基础上,综合考虑车身的静、动态力学特性,将轻量化研究与实际生产相结合,优化了车身零部件板厚的质量分布,实现了动力学特性基本不变,优化后总质量降低了7.84%,扭转刚度提高了1.54%;弯曲刚度提高了30%,为车身结构优化找到了一种切实可行的分析方法。The body-in-white finite element model of a type of domestic car was established. The effectiveness and the reliability of the numerical simulation model were verified by comparing the results of prototype vehicle＇s stiffness, modal test and finite element analysis. On this basis, considered the static and dynamic mechanical property of the body comprehensively, combined lightweight research with manufacture, mass distribution of the thicknesses of body parts was optimized, and dynamic mechanical property was essentially kept. The total mass of the optimized body reduced by 7. 84%, the torsional stiffness increased by 1.54% and the bending rigidity increased by 30%. A practical analyzing method of optimizing body structure was provided.

关 键 词：汽车工程 轻量化 有限元 白车身 刚度 

分 类 号：U463.82[机械工程—车辆工程]