负泊松比安全带织带乘员碰撞保护性能的FE仿真  

FE simulation of the occupant crash protection performance of the negative Poisson's ratio seat belt webbing

作　　者：亓昌[1] 安文姿[1] 杨姝[1] 

机构地区：[1]大连理工大学 汽车工程学院数字化汽车研究所

出　　处：《汽车安全与节能学报》2013年第3期215-222,共8页Journal of Automotive Safety and Energy

基　　金：国家自然科学基金(50905024;51105053);辽宁省自然科学基金(20102026);高等学校博士点基金(20090041120032;20110041120022);中央高校基本科研业务费项目(DUT13LK47)

摘　　要：为减轻汽车碰撞事故中安全带可能造成的乘员伤害,提出了具有负泊松比(NPR)特性的安全带织带的概念。建立了包含人体胸部简化模型的织带性能仿真有限元模型。对比了NPR织带与传统织带的乘员保护效能;研究了泊松比、摩擦因数对NPR织带保护效能的影响;Madymo假人碰撞仿真,验证了NPR织带的有效性。结果表明:与传统织带相比,NPR织带能有效减小乘员胸部压缩变形量;泊松比越小,保护效能越佳;而胸部与织带间的摩擦不利于NPR织带保护效能的发挥。A concept of seat belt webbing with negative Poisson＇s ratio （NPR） characteristic was proposed for mitigating the harm to occupants by the seat belt in car-crash accidents. A finite element （FE） model with a simplified human chest model was established and used for webbing performance simulation. The occupant protection performances of NPR webbing were compared with that of the traditional webbing. The effects of Poisson＇s ratio and friction coefficient on the NPR webbing＇s performance were investigated. The effectiveness of the NPR webbing was verified by MADYMO dummy crash simulation. The results indicate that compared with the traditional seat belt webbing, the NPR webbing can effectively reduce the occupant chest deflection; the smaller the Poisson＇s ratio, the better the protection performance; friction between the occupant chest and the NPR webbing is not conducive to the effectiveness of the NPR webbing.

关 键 词：汽车安全 乘员保护 安全带织带 负泊松比(NPR) 有限元(FE)仿真 

分 类 号：U461.91[机械工程—车辆工程]