基于行人小腿保护的泡沫结构优化分析

The Optimum Design of Foam Structure Based on Pedestrian Crus Protection

行人与汽车碰撞过程中,小腿碰撞损伤主要是由前保险杠与小腿碰撞产生的弯曲力矩造成,小腿损伤主要表现为骨折。对行人小腿碰撞进行损伤分析,发现可以通过改善吸能泡沫结构来降低胫骨加速度、膝关节弯曲角度、剪切位移值,从而减少小腿的碰撞损伤。本文以某车型为例,通过有限元仿真分析对行人小腿碰撞和泡沫结构之间的关系进行探究。将整体形泡沫结构优化设计成为中空形泡沫结构,并以某车型为实例,对比分析优化前后的仿真结果,验证了吸能泡沫结构优化设计的有效性。

During the collision between a pedestrian and a car, the crus injury is mainly caused by the bending moment caused by the collision between the front bumper and the crus. Based on the damage analysis of pedestrian crus collision, it is found that the tibial acceleration, knee joint bending angle and shear displacement can be reduced by improving the energy-absorbing foam structure, so as to reduce the collision damage of the crus. In this paper, the whole bubble structure was improved by a hollow structure, and the simulation results were compared and analyzed between the original model and the optimization model. The effectiveness of the energy-efficient foam structure optimization design was verified. Some certain model of car is used in this paper to analyze the relationship between the collision and foam structure of the pedestrian crus by finite element simulation. The overall shape foam structure optimization design became a hollow shape structure, taking the model as an example, the simulation results of the analysis before and after optimization,which is used to verify the effectiveness of the energy-absorbing foam structure optimization design.