某轿车侧门碰撞性能的安全性改进
栾文哲，尉庆国
（中北大学 机电工程学院，山西 太原 030051）
摘要：针对某国产轿车侧面碰撞安全性问题，应用CATIA软件建立该车型车门的三维几何模型。利用有限元理论与方法，建立该车门基于HyperMesh/LS-DYNA环境下的有限元模型，LS-DYNA求解器对该车门进行侧面碰撞性能的仿真分析，得到内板最大变形云图、车门上两个关键位置点位移－时间历程曲线和车门内能变化曲线。通过增加防撞杆的数量、在防撞杆的内部填充低密度泡沫、改变防撞杆的壁厚三种措施对原车门结构进行改进。通过与原车门碰撞性能各项参数的对比分析，在一定程度上改善了原车门侧面碰撞性能。
关键词：轿车车门；有限元法；侧面碰撞；结构改进；泡沫吸能
中图分类号：TH16；U463.83+4 文献标识码：A 文章编号：1006－0316 (2013) 02－0019－05
The safety improvement for car door crashworthiness performance
LUAN Wen-zhe，WEI Qing-guo
( College of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China )
Abstract：Aimed at the problem of car door side crashworthiness, the three-dimensional geometric model of the car door was established through CATIA software. By using finite element theory and method, the finite element model of the car door was established based on HyperMesh/LS-DYNA environment. The side impact performance of the car door was solved with LS-DYNA. The maximum deformation nephogram of the inside plate, the displacement -time history curve of the two key position points and the internal energy changing curve were got. Improvement of car door structure was conducted by increasing the number of side impact beam, filling the beam with low-density foam, changing the wall thickness. Through the contrastive analysis of the scheme, the performance of car door side crashworthiness is improved.
Key words：car door；finite element method；side crash；structure improvement；foam bucking
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收稿日期：2012－08－04
作者简介：栾文哲（1986－），男，黑龙江哈尔滨人，硕士研究生，主要研究方向为车辆CAD/CAE技术；尉庆国（1969－），男，山西运城人，副教授，主要研究方向为车辆总体设计技术。
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