载货汽车防护装置最佳离地高度和刚度的分析

在大型载货汽车与轿车的碰撞事故中，轿车钻入载货汽车下部是十分可怕的死亡交通事故形态。前下部防护装置，后下部防护装置能够有效地防止钻入碰撞事故。此文分析了下部防护装置的离地高度和刚度对钻入碰撞防护效果的影响，下部防护装置在确保阻止钻入碰撞功能的前提下应尽可能多地吸收碰撞能量，以减轻轿车在碰撞中的伤害。以上述原则计算出了不同离地高度的下部防护装置的最佳刚度。

An Analysis on the Optimal Ground Clearance and Stiffness of Truck Under-run Protector

In heavy truck-car crash accident, the car is likely to run under the heavy truck, often leading to a fatal accident. The front and rear under-run protection devices (URPDs) can prevent effectively the under-run crash accident. In addition to under-run prevention, URPDs should also absorb more energy of under-run cars to relieve the damage to the cars. According to this principle, the respective optimum stiffnesses of URPDs are computed in different ground clearances.