基于能量吸收控制的工程车辆倾翻保护结构设计方法

Design method for roll-over protective structure of engineering vehicle based on energy absorption

基于能量吸收最大化的思想,研究了大型矿用工程车辆倾翻保护结构的设计方法,即在强度和刚度满足要求的前提下,在立柱上增开塑性铰孔,对局部结构进行弱化处理使其能够在预定的变形范围内达到吸能要求.进行了计算机仿真和性能试验,运用有限元方法对不同塑性铰孔开孔方案进行了仿真分析,得出了最优塑性铰孔开孔方案;通过侧向加载性能试验对仿真结果进行了验证.研究结果表明,在立柱上增开塑性铰孔可以实现对能量吸收的有效控制,避免脆性破坏发生,满足设计及相关标准要求.

A safety-cab type roll-over protective structure＇ s design method was developed for engineering vehicle based on the idea of the most energy absorption. The method is to design plastic hinge hole which can protect the welding line, control the energy absorption and position or time of plastic hinge＇ s development. Computer simulation and test methods of the behavior analysis of the whole loader class roll-over protective structure with the lateral loading were carried. By contrasting the resuh of test with that of simulation analysis, proved the rationality and feasibility of design of plastic hinge hole, so achieved the new method of roll-over protective structure in accordance of energy absorption.