带规则纹路薄壁管的抗撞性分析与优化  

Crashworthiness analysis and optimization of thin-walled tube with regular folding patterns

作　　者：薛贵林[1] 隋允康[1] 胡晓光[1] 杜家政[1] 

机构地区：[1]北京工业大学工程数值模拟中心,北京100124

出　　处：《强度与环境》2009年第3期30-38,共9页Structure & Environment Engineering

基　　金：国家自然科学基金(10872012);北京自然科学基金(3093019);大连理工大学工业装备结构分析国家重点实验室基金项目(GZ0819);湖南大学汽车车身先进设计制造国家重点实验室开放基金(30715002);高校博士点基金(20060005010)资助

摘　　要：作为吸能器,薄壁结构被广泛地应用于汽车和船舶的抗撞结构中,不同结构缓冲吸能特性相差较大。为了能得到最佳缓冲吸能特性的薄壁结构,应用LS-DYNA软件对一种新型规则纹路折纹管进行抗撞性分析,并采用斐波那契搜索的方法对该折纹管的正多边形截面的边数和折纹个数进行优化设计。优化结果表明截面为正十四边形,侧面有29个折纹时结构吸能效果最好。Thin-walled structures are widely used in crashworthiness structure of automobile and ship as energy absorbers, but different structures perform absolutely different in energy absorption. To obtain the best thin-walled structure to absorb energy, a new tube with folding pattern was analyzed for crashworthiness with LS-DYNA software, and Fibonacci Search methods was used to optimize the ploygon of section and number of folded pattern. The optimization results show that the tube with 14-gon section and 33 patterns absorbs energy is best.

关 键 词：折纹管 LS-DYNA 斐波那契搜索 优化设计 

分 类 号：TU311.3[建筑科学—结构工程]