基于模态分析的汽车塑料保险杠拓扑优化  

Topology Optimization of Automobile Plastic Bumper Based on Modal Analysis

作　　者：王镇江[1] 何造 林广谊 龚世海 李健 

机构地区：[1]广西科技大学广西汽车零部件与整车技术重点实验室,广西柳州545006 [2]柳州裕信方盛汽车饰件有限公司,广西柳州545006

出　　处：《塑料》2017年第5期9-12,共4页Plastics

基　　金：广西科技大学硕士研究生创新项目(GKYC201701)

摘　　要：为了实现汽车塑料保险杠的轻量化设计,结合保险杠的动态特性,采用拓扑优化的方法进行塑料保险杠的结构设计。以某国产SUV汽车的塑料保险杠为例,应用Altair的Optistruct模块,对塑料保险杠进行有限元建模和模态分析,得到了保险杠的有限元分析模型,然后对其进行模态分析,通过计算得到了其固有频率。在保证保险杠模态性能不降低的前提下,以保险杠的体积最小化为目标,应用拓扑优化理论优化了保险杠主要厚度区域的局部区域厚度,得到了材料的理想分布,根据拓扑优化厚度结果云图,结合制造与加工生产的实际情况,确定保险杠的轻量化设计方案。最终保险杠的重量减轻了11%,其主要模态频率变化在1 Hz以内。In order to achieve lightweight design for automotive plastics bumper, dynamic characteristics of bumpers was considered, topology optimization was introduced into structural design of plastic bumpers. A domestic SUV auto plastic bumper,for example, Ahair＇s Optistruct module for finite element modeling and modal analysis of plastic bumpers were used, so finite element analysis model of the bumper was achieved. Then through modal analysis, the natural frequencies of the plastic bumper was obtained by calculating. Under the premise of not reducing modal properties of the bumper, aiming to minimize the size of the bumper, the ideal distribution of the material was achieved by applying topology optimization to optimize local thickness of the main area of the bumper. By taking the need for manufacture and process into account, according to the thickness of topology optimization results images, the lightweight design of the bumper was determined. In the end,the quality of the bumper was reduced by 11% and the main modal frequency changed within 1 Hz.

关 键 词：塑料保险杠 有限元分析 模态性能 拓扑优化 轻量化 

分 类 号：U468.4[机械工程—车辆工程] TP391.7[交通运输工程—载运工具运用工程]