摘要
为了设计四模块低地板有轨列车耐撞性车体防撞装置,实现列车被动安全保护,采用数值仿真技术进行准静态和动态压缩计算,研究不同孔隙率下泡沫铝防撞块的吸能特性。研究结果表明:泡沫铝防撞块准静态压缩的压溃力呈现明显的弹性阶段、稳定压溃阶段和致密化阶段;泡沫铝防撞块的压溃力和吸收的能量随着孔隙率的减小而增加;同一孔隙率下,动态压缩过程初始压溃力的变化趋势与准静态压缩的压溃力大致相同,而随着泡沫铝的压实,准静态压缩的压溃力呈线性增大。
In order to design an anti-collision device of crashworthiness car body for four module low floor tramcar, to achieve the goal of passive safety protection for vehicle, the energy absorption characteristics of foam aluminum anti-collision block with different porosity is researched, by the means of quasi-static and dynamic compression calculations using numerical simulation technology. The research results show that the crushing force of quasi-static compression for foam aluminum presents three stages, which are elastic stage, stable crushing stage, and densification stage. The crushing force and absorbed energy of foam aluminum will increase as the porosity decreases. At the same porosity, the change trend of the initial crushing force in the dynamic compression process is almost the same as crushing force of the quasi-static compression process, and the crushing force of the quasi-static compression increases linearly with the compaction of the foam aluminum.
出处
《电力机车与城轨车辆》
2017年第6期21-24,45,共5页
Electric Locomotives & Mass Transit Vehicles
关键词
泡沫铝
防撞装置
吸能特性
孔隙率
foam aluminum
anti-collision device
energy absorption characteristics
porosity
