摘要
动车组排障器作为车头下悬挂设备,对列车运行安全以及运行环境有着极为重要的影响,必须对它进行强度分析及轻量化设计。本文基于EN15227-2020标准对动车组排障器进行静强度分析,确定危险工况,并提出以拓扑优化以及试验设计-响应面优化的综合优化方法,对排障器底板冗余材料进行拓扑优化。通过试验设计拟合出响应面,采用GRSM方法对响应面进行二次优化。通过两次优化,排障器质量共减轻17%,各板件母材及焊缝处的强度安全系数均满足要求,使得排障器材料分布更为合理,质量更轻,为动车组排障器设计提供了新的思路以及方案。
Strength analysis and lightweight design of the EMU cowcatcher is essential because, as the suspension equipment under the locomotive, it has a great influence on the running safety and operation environment of the train. Based on EN 15227-2020 standard, this paper analyzed the static strength of the cowcatcher of EMU and determined the dangerous working condition. A comprehensive optimization method was proposed, combing topology optimization combined with experimental design-response surface optimization, so as to optimize the redundant materials of the bottom plate of the cowcatcher. The response surface was fitted through experimental design, and GRSM method was used for secondary optimization. The mass of the cowcatcher was reduced by 17% and the strength safety factors of the plate metal and welding seams met the requirements. The design makes the material distribution more reasonable and the cowcatcher lighter.
作者
刘星宇
李娅娜
LIU Xingyu;LI Ya’na(College of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《机械》
2023年第1期35-41,共7页
Machinery
关键词
排障器
静强度分析
拓扑优化
灵敏度分析
响应面优化
cowcatcher
static strength analysis
topology optimization
sensitivity analysis
response surface optimization
