计算力学学报2016，Vol.33Issue(4)：528-535,8.DOI:10.7511/jslx201604017
基于元胞自动机的变厚度薄壁梁侧向耐撞性优化设计方法
A hybrid cellular automata based method of variable thickness thin-walled beam for crashworthiness optimization under lateral impact
摘要
Abstract
Thin-Walled beams (TWB ) are the most important kind of impact protection devices of automobiles and other vehicles.Research on the lateral crashworthiness and its improvement method, besides the axial crashworthiness,is very important.In this paper,a method to improve the lateral crash-worthiness of variable thickness thin-walled beam(VTWB)through reasonably designing the thickness distribution was studied,and a hybrid cellular automata based method for designing the thickness distri-bution was proposed.Based on the performance requirements and structural characters of an automobile B-pillar,the thickness distribution is designed firstly for optimization of the lateral crashworthiness of a simply supported VTWB.The penetration displacement has an 82% decrease from that of the uniform thin-walled beam,which proved the effectiveness of the design.Then,considering the convenience to manufacture through flexible rolling technology,the VTWB with wall thickness varying along axial direction was given.The penetration displacement in this design has a 73% decrease from that in the uni-form thin-walled beam.The reduction of the penetration displacement is slightly decreased compared with that of the VTWB with 3D thickness distribution,but the manufacturing is much more convenient. The design examples indicate that variable thickness design can effectively improve the lateral crashwor-thiness of the thin-walled beam.The proposed method can get a reasonable thickness distribution of VTWB,and thus it is an effective optimization design method for lateral crashworthiness.关键词
冲击吸能,薄壁结构,变厚度板/结构优化/元胞自动机Key words
impact energy absorption/thin-walled structure/variable thickness panel/structure optimiza-tion/cellular automata分类
数理科学引用本文复制引用
刘书田,刘杨,童泽奇..基于元胞自动机的变厚度薄壁梁侧向耐撞性优化设计方法[J].计算力学学报,2016,33(4):528-535,8.基金项目
国家自然科学基金(11332004,11172052) （11332004,11172052）
中航工业产学研合作创新工程(CXY2013DLLG32) （CXY2013DLLG32）
111引智计划(B14013)资助项目 （B14013）
