汽车与防撞护栏的碰撞运动研究

Study on the Crash Movement between Vehicles and Crashworthy Barriers

对防撞护栏与汽车工作特性以及防撞机理进行分析,并分析现有计算碰撞力的原理和方法, 修正考虑汽车局部变形和护栏变形共同影响的修正的质量一弹簧模型,确定车辆和防撞护栏系统动力方程,给出在汽车冲撞过程中护栏所受碰撞力的计算表达式,求解碰撞力,并与实车碰撞结果进行比较和分析。对合理设计新型防撞护栏提供了重要的依据。

Analysis of the working characteristic and mechanism of Vehicle impacting safety barrier. And Research on current the theory and method of calculating impact forces, considered the deformation of both vehicle and safety barrier, the dynamic model of vehicle impacting safety barrier system is established, and its dynamic equation is also given. The calculation expression of impact forces is also given and the vehicle impact forces acting on safety barrier is calculated. The results of movement response are compared with the experiment one of actual vehicle safety barrier. The conclusions from the paper can be referred for improved designed the new types of safety barrier.