基于均衡支撑的小腿保护理念

Theoretical Research of Lower Leg Protection Based on the Balanced Support

为了实现碰撞发生时对驾驶员小腿的较优保护,提出了均衡支撑小腿的保护理念。根据该保护理念,提出了脚跟支撑设计和油门踏板基座加宽设计两种方案。结合某两款车型开发过程中的驾驶员右脚受伤严重问题,基于完成小腿损伤对标的整车有限元模型,对比了两种方案的保护效果,并实现了两种方案的量产设计及整车试验验证。结果表明,基于整车有限元模型的小腿损伤模拟精度可达90%,脚跟支撑设计对驾驶员右脚形式一和形式二伤害改善幅度为36%和39%,油门踏板加宽设计对驾驶员右脚形式三伤害改善幅度为69%。该两款车型在2015版C-NCAP评价中小腿得分率在90%以上,基于均衡支撑保护理念的方案可以较好地解决碰撞中的小腿受伤问题。为了更好地指导概念设计,基于均衡设计理念提出了满足驾驶员右脚保护的地毯和油门踏板设计要求。

To better protect drivers’ lower leg in a car crash,a protection theory based on the balanced support was proposed. A heel support design and a design to broaden the base plate beneath the gas pedal were introduced. The protection effects were compared by using a vehicle finite element model based on the driver’s right foot injury problem in the vehicle development process. Furthermore,the two designs for mass production and vehicle test validation were achieved. The results show that the accuracy of lower leg injury simulation based on the vehicle finite element model can reach90%,and the balanced support protection designs can help prevent the lower leg injury during collisions. With the heel support design,the reduction in the driver’s right foot injury form one and form two were 36% and 39%,while with the broadening gas pedal design,the reduction in the injury form three was 69%. Besides,these two models scored more than 90% in the 2015 version of C-NCAP lower leg evaluation. The requirements for carpet and gas pedal design were proposed based on the balanced design concept to protect drivers’ right foot and to guide the conceptual design.