油门踏板对驾驶员下肢损伤的影响  

Effect of Accelerator Pedal on Driver's Lower Extremity Injury

作　　者：吴俊[1] 刘宇豪 姚远 曹立波[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]中国汽车技术研究中心,天津300300 [3]汽车噪声振动和安全技术国家重点实验室,重庆400023

出　　处：《华南理工大学学报（自然科学版）》2017年第8期28-34,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51505137);汽车噪声振动和安全技术国家重点实验室开放基金项目(NVHSKL-201410)~~

摘　　要：汽车正面碰撞中驾驶员脚部与油门踏板直接作用,其力学性能是影响驾驶员下肢损伤的重要因素之一.然而,现阶段在对驾驶员下肢损伤的仿真研究中,油门踏板常被忽略或者使用刚体模型模拟,不能准确反映踏板对驾驶员下肢的作用情况且无法研究踏板断裂吸能对驾驶员下肢损伤的影响.针对这一情况,文中建立了详细的油门踏板有限元模型,并通过6组踏板部件实验充分验证了模型的有效性.基于该模型研究了踏板摩擦系数、旋转刚度、踏板行程、踏板侵入量和断裂扭矩等参数对驾驶员下肢损伤的影响.结果表明,油门踏板断裂扭矩对驾驶员下肢损伤具有显著的影响,降低踏板断裂扭矩能够有效地降低驾驶员胫骨力和胫骨指数,进而降低驾驶员下肢损伤的风险.研究结果指出了可断裂式踏板设计对驾驶员下肢损伤防护的意义,并为油门踏板结构设计提供参考.In frontal crashes, th e a c c e le ra to r p e d a l h a s a d ire c t im p a ct on th e d r iv e r ’s f e e t,an d its m e ch an ic a lproperty is one of the main factors affecting the drivers lower extremity injury. However,in researches on the drivers lower extremity injury, the accelerator pedal is often ignoregid body model,which can n o t a c cu ra te ly ref lect th e effect of th e pe da l on the dr iver s lower extremity used to analyze the effect of the pedal fracture on the driver’s lower extremity injury. In order to solve these prob-lems ,a detailed finite element model of the accelerator pedal is constructed,a n d i t is proved to b e effective through six groups of pedal component tests. Based on this model,th e effects of th e p e d a l f ric tion c o e f f ic ie n t,th e rotation stiffness,the travel and the intrusion volume, th e f ra c tu re to rq u e on th e d r iv e r ’s lower extremity in ju ry a re re -vealed .The results show that the fracture torque of the pedal has a significant effect on the lower extremity injury.Specifically,reducing the fracture torque can greatly decrease the driver’s tibia force and tibia index,thus reducingthe risk of the lower extremity injury. This research result also highlights the value of the breakaon the driver’s lower extremity protection,an d c a n b e tak en as a re fe ren c e for th e s tru c tu re pedals.

关 键 词：正面碰撞 油门踏板 下肢损伤 

分 类 号：U461.91[机械工程—车辆工程]