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| A hybrid cellular automata based method of variable thickness thin-walled beam for crashworthiness optimization under lateral impact |
| Received:May 14, 2016 Revised:June 12, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201604017 |
| KeyWord:impact energy absorption thin-walled structure variable thickness panel structure optimization cellular automata |
| Author | Institution |
| 刘书田 |
大连理工大学 运载工程与力学学部 工业装备结构分析国家重点实验室, 大连 |
| 刘杨 |
大连理工大学 运载工程与力学学部 工业装备结构分析国家重点实验室, 大连 |
| 童泽奇 |
大连理工大学 运载工程与力学学部 工业装备结构分析国家重点实验室, 大连 |
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| 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 crashworthiness 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 distribution 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 uniform 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 crashworthiness 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. |
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