基于接头拓扑优化的车身刚度优化  

Car Body Stiffness Optimization based on Joint Topology Optimization

作　　者：陈方根 卿雕 刘善英 CHEN Fanggen;QING Diao;LIU Shanying(Dongfeng Liuzhou Motor Co.,Ltd.,Liuzhou Guangxi 545000,China)

机构地区：[1]东风柳州汽车有限公司,广西柳州545000

出　　处：《装备制造技术》2021年第10期58-61,共4页Equipment Manufacturing Technology

摘　　要：车身关键接头对车身刚度有决定性的影响。在车身弯扭工况下,各部分受力情况复杂,直接优化整个车身具有一定的盲目性,且需要更多的计算资源。为简化车身刚度优化问题,将车身刚度优化问题简化到接头刚度的优化问题上,首先确定指定接头在车身刚度下的受力情况,然后通过拓扑优化方法对接头结构刚度进行优化设计,再进一步验证方案在车身刚度上的有效性。分析结果表明:车身接头刚度与车身弯扭刚度呈正相关关系,基于车身接头简化工况的拓扑优化能快速识别接头内部的传力路径,为接头结构优化提供参考,提升了接头刚度,也即间接提升车身刚度。为车身刚度优化设计提供了新的理论依据和思路。The key joints of vehicle body have a decisive influence on the stiffness of vehicle body.Under the bending and torsion condition of the body,the stress of each part is complex.Directly optimizing the whole body has a certain blindness and requires more calculation resources.In order to simplify the body stiffness optimization problem,the body stiffness optimization problem is simplified to the joint stiffness optimization problem.Firstly,the stress of the specified joint under the body stiffness is determined,and then the joint structural stiffness is optimized by the topological optimization method,and then the effectiveness of the scheme in the body stiffness is further verified.The analysis results show that there is a positive correlation between the body joint stiffness and the body bending and torsion stiffness.The topology optimization based on the simplified working condition of the body joint can quickly identify the force transmission path inside the joint,provide a reference for the joint structure optimization,and improve the joint stiffness,that is,indirectly improve the body stiffness.It provides a new theoretical basis and idea for the optimization design of body stiffness.

关 键 词：拓扑优化 接头刚度 车身刚度 刚度优化 

分 类 号：U463.82[机械工程—车辆工程]