头部撞击发动机罩板的损伤模拟.pdfVIP

第 35 卷　第 6 期 哈 　尔 　滨 　工 　业 　大 　学 　学 　报 Vol 35 No 6 　 2 0 0 3 年 6 月 J OURNAL OF HARB IN INSTITU TE OF TECHNOLO GY 　 J une , 2003 　　　　　　 头部撞击发动机罩板的损伤模拟 赵桂范 ,张晓乾 ,杜星文 ( 哈尔滨工业大学 复合材料研究所 , 黑龙江 哈尔滨 150001 , Email :vit @sina. com) 摘 　要 : 为了减少人与车相撞事故中行人的伤亡人数 ,采用有限元三维实体建模技术 ,建立了包括头皮和头 骨两层球体结构的头部各向同性粘弹性模型和发动机罩板的各向同性弹性模型 ,分析了头部与发动机罩板 的瞬态大变形非线性撞击响应 ,得到了头部与发动机罩板相撞时的速度、角度、位置及发动机罩板的厚度等 因素对头部伤害的影响规律. 结果表明头部受到的撞击加速度值和文献中的试验结果吻合较好. 能够为设计 具有行人头部保护功能的车身结构提供有力的理论依据. 关键词 : 损伤模拟 ;有限元 ;动态撞击 ;头颅 ;发动机罩板 ( ) 中图分类号: TB33 文献标识码 : A 文章编号 : 0367 - 6234 2003 06 - 0719 - 04 Head and engine hood impacting injury simulation ZHAO Guifan , ZHAN G Xiaoqian , DU Xingwen (Composite Center , Harbin Institute of Technology , Harbin 150001 ,China , Email :vit @sina. com) Abstract : Simulation of human head injur y caused during collision with engine hood can provide a theoreti cal basis for reducing pedestrian ’s casualties in the vehiclepedestrian collision accidents. 3 - D finite ele ment modeling technology is adopted here to develop the isotropicviscoelastic model of the head , which contains spherical scalp and skull , as well as the isotropicelastic model of the engine hood. Nonlinear re sponses of the head ’s instantaneous deformation when it collides with the engine hood are analyzed. The in fluenc of the impacting velocity , impacting angle , impacting position , and the thickness of the engine hood to the head ’s injur y was established. Analysis results reveal that the impacting acceleration of the head is in good accordance with the reported testing results , which proves the model can provide eff