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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。
The crashworthiness guardrail and automobile working characteristics as well as the collision avoidance mechanism are analyzed. The existing principles and methods of calculating the impact force are analyzed, and the modified mass-spring model considering the local deformation of the vehicle and the deformation of the guardrail is amended to determine the vehicle and collision avoidance The dynamic equation of the guardrail system is given, and the calculation expression of the impact force of the guardrail during the collision of the vehicle is given. The collision force is calculated and compared with the actual vehicle collision result. The reasonable design of a new type of crash barriers provided an important basis.