动车组车体内端墙结构拓扑优化
刘春艳1,2王家兴2于庆斌2李喜春2孙博飞2廉帅2
Topology Optimization of EMU Carbody Inner-end Wall Structure
LIU Chunyan1,2WANG Jiaxing2YU Qingbin2LI Xichun2SUN Bofe2LIAN Shuai2
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作者信息:1.西南交通大学轨道交通运载系统全国重点实验室， 610031， 成都；
2.中车长春轨道客车股份有限公司国家轨道客车工程研究中心， 130062， 长春
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Affiliation:1.State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, 610031, Chengdu, China;
2.National Engineering Research Center of Railway Vehicles, CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20253009
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中图分类号/CLCN:U270.3
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栏目/Col:车辆制造与列车控制
摘要:
［目的］为进一步提升高速铁路的运行效率和经济效益，实现车体轻量化设计，有必要对动车组车体内端墙结构拓扑优化。［方法］以动车组车体内端墙为研究对象，在结构模态与气密强度的两种分析工况下，以结构固有模态与应力为约束条件，建立结构质量最小为目标函数的拓扑优化有限元模型，采用变密度法对内端墙结构进行拓扑优化分析，得出该结构的载荷力流传递路径。为了验证拓扑优化结果的可靠性，在原车结构的基础上，根据优化结构布置材料，得出一种承载部件的新结构。建立有限元模型，对内端墙原结构和优化后结构的整车及局部性能影响进行对比。［结果及结论］优化后结构在不损失整车性能的情况下，使内端墙质量减轻了30%，验证了该拓扑优化结构的可行性。
Abstracts:
［Objective］ To further improve the operational efficiency and economic benefits of high-speed railways and to achieve lightweight carbody design, it is necessary to carry out topology optimization of the inner-end wall structure of EMU (electric multiple unit) carbodies. ［Method］ Focusing on the inner-end wall of EMU carbody, under two analysis conditions-structural modal and air-tightness strength, and taking the structure′s natural mode and stress as constraints, a finite element model for topology optimization is established with minimizing structural mass as the objective function. A topology optimization analysis of the inner-end wall structure is performed using the variable density method to determine its load force flow transmission path. To verify the reliability of the topology optimization results, a new structural layout for the load-bearing components is designed based on an optimized configuration while retaining the original carbody framework. A finite element model is built to compare the effects of the original and optimized inner-end wall structures on both the overall vehicle and the localized structural performance. ［Result & Conclusion］ The optimized structure achieves a 30% reduction in inner-end wall mass without compromising overall vehicle performance, thereby confirming the feasibility of the topology-optimized structure.
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