动车组隔离变压器柜体强度分析与轻量化研究
仲凡1，王俊勇1，董宇微2
（1.西南交通大学 机械工程学院，四川 成都 610031；2.常州大学 机械与轨道交通学院/智能制造产业学院，江苏 常州 213100）
摘要：对动车组车下吊挂隔离变压器柜体进行结构强度分析，利用Hypermesh软件建立隔离变压器柜有限元模型，依据EN 12663-2010确定柜体静强度分析工况及疲劳强度分析工况，基于von Mises应力评估柜体静强度，根据FKM标准评估柜体疲劳强度。校核结果表明，柜体强度余量较大。基于校核结果，以柜体骨架主要部位板厚为设计变量、强度为约束条件、整柜重量为优化目标，采用Kringing法构建隔离变压器柜代理模型，以全局响应算法对代理模型进行寻优迭代，优化结果表明，在满足柜体静强度、疲劳强度及刚度要求下，柜体重量减轻17%，优化效果明显，验证优化方法可行。
关键词：隔离变压器柜；疲劳强度；轻量化设计；代理模型；FKM标准
中图分类号：U270.381 文献标志码：A doi：10.3969/j.issn.1006-0316.2024.01.005
文章编号：1006-0316 (2024) 01-0030-08
Strength Analysis and Lightweight Research on Isolation Transformer Cabinet of EMU
ZHONG Fan1，WANG Junyong1，DONG Yuwei2
( 1.School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2.School of Mechanical Engineering and Rail Transit / School of Intelligent Manufacturing, Changzhou University, Changzhou 213100, China )
Abstract：The structural strength analysis is carried out on the underside hanging isolation transformer cabinet of EMUS. The finite element model of the isolation transformer cabinet is established by using the Hypermesh software. And the static strength analysis conditions and fatigue strength analysis conditions of the cabinet are determined according to EN 12663-2010 standard. The static strength of the cabinet body is evaluated according to the von Mises standard, and the fatigue strength of the cabinet body is evaluated according to the FKM standard. The calibration results show that the cabinet strength margin is large. On the basis of the calibration results, taking the plate thickness of the main part of the cabinet skeleton as the design variable, the strength as the constraint condition, and the weight of the whole cabinet as the optimization objective, the Kringing method is used to construct an isolation transformer cabinet agent model, and the global response algorithm is used to conduct the optimization iteration of the agent model. The optimization results show that when the static strength, fatigue strength and stiffness requirements of the cabinet are met, the cabinet weight is reduced by 17%. The optimization effect is obvious, which verifies the feasibility of the optimization method.
Key words：isolation transformer cabinet；fatigue strength；lightweight design；surrogate model；FKM standard
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收稿日期：2023-09-25
基金项目：国家自然科学基金项目——高海拔长大坡道下机车车辆制动性能退化机理及抑制方法（U22A20181）
作者简介：仲凡（1997－），男，江苏宿迁人，硕士研究生，主要研究方向为轨道车辆设计及理论，E-mail：zhongfan.x@foxmail.com。
（1.西南交通大学 机械工程学院，四川 成都 610031；2.常州大学 机械与轨道交通学院/智能制造产业学院，江苏 常州 213100）
摘要：对动车组车下吊挂隔离变压器柜体进行结构强度分析，利用Hypermesh软件建立隔离变压器柜有限元模型，依据EN 12663-2010确定柜体静强度分析工况及疲劳强度分析工况，基于von Mises应力评估柜体静强度，根据FKM标准评估柜体疲劳强度。校核结果表明，柜体强度余量较大。基于校核结果，以柜体骨架主要部位板厚为设计变量、强度为约束条件、整柜重量为优化目标，采用Kringing法构建隔离变压器柜代理模型，以全局响应算法对代理模型进行寻优迭代，优化结果表明，在满足柜体静强度、疲劳强度及刚度要求下，柜体重量减轻17%，优化效果明显，验证优化方法可行。
关键词：隔离变压器柜；疲劳强度；轻量化设计；代理模型；FKM标准
中图分类号：U270.381 文献标志码：A doi：10.3969/j.issn.1006-0316.2024.01.005
文章编号：1006-0316 (2024) 01-0030-08
Strength Analysis and Lightweight Research on Isolation Transformer Cabinet of EMU
ZHONG Fan1，WANG Junyong1，DONG Yuwei2
( 1.School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2.School of Mechanical Engineering and Rail Transit / School of Intelligent Manufacturing, Changzhou University, Changzhou 213100, China )
Abstract：The structural strength analysis is carried out on the underside hanging isolation transformer cabinet of EMUS. The finite element model of the isolation transformer cabinet is established by using the Hypermesh software. And the static strength analysis conditions and fatigue strength analysis conditions of the cabinet are determined according to EN 12663-2010 standard. The static strength of the cabinet body is evaluated according to the von Mises standard, and the fatigue strength of the cabinet body is evaluated according to the FKM standard. The calibration results show that the cabinet strength margin is large. On the basis of the calibration results, taking the plate thickness of the main part of the cabinet skeleton as the design variable, the strength as the constraint condition, and the weight of the whole cabinet as the optimization objective, the Kringing method is used to construct an isolation transformer cabinet agent model, and the global response algorithm is used to conduct the optimization iteration of the agent model. The optimization results show that when the static strength, fatigue strength and stiffness requirements of the cabinet are met, the cabinet weight is reduced by 17%. The optimization effect is obvious, which verifies the feasibility of the optimization method.
Key words：isolation transformer cabinet；fatigue strength；lightweight design；surrogate model；FKM standard
———————————————
收稿日期：2023-09-25
基金项目：国家自然科学基金项目——高海拔长大坡道下机车车辆制动性能退化机理及抑制方法（U22A20181）
作者简介：仲凡（1997－），男，江苏宿迁人，硕士研究生，主要研究方向为轨道车辆设计及理论，E-mail：zhongfan.x@foxmail.com。
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