In order to improve crashworthiness of electric locomotives,this paper presents a dynamic topology optimization study aimed at improving the crashworthiness at the underframe's front end of a certain model of electric locomotives.Firstly,a finite element model of the electric locomotives was established,and the main path of energy flow in the underframe was identified by dynamic topolo-gy optimization analysis based on hybrid cellular automata.Then,according to the structural characteristics of the electric locomotive body,the front-end structure of the underframe was optimized in design and the inclusion of aluminum honeycomb energy absorbing ma-terials.Finally,the finite element models before and after optimization were compared through the collision simulation calculation.The results reveal a significant reduction in peak acceleration,with the optimized car body at 402.56 m/s2,which is 39.29％lower than value before optimization of 663.04 m/s2.Additionally,the peak interface force upon collision is reduced by 35.71％after optimization.These findings demonstrate the rationality and effectiveness of topology optimization design in improving the crashworthiness of this specific locomotive model's structures.
关键词
电力机车/机车耐撞性/动态拓扑优化/混合元胞自动机法/铝蜂窝
Key words
electric locomotive/crashworthiness of locomotive/dynamic topology optimization/hybrid cellular automata/aluminum honeycomb
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