Modal and Lightweight Optimization of Railway Passenger Carbody Under Multi-level Topology Strategy

李佚非; 卢耀辉; 宋承裕; 韩龙龙; 李腾宇

doi:10.13433/j.cnki.1003-8728.20240015

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Modal and Lightweight Optimization of Railway Passenger Carbody Under Multi-level Topology Strategy

更新时间：2026-04-23

- Modal and Lightweight Optimization of Railway Passenger Carbody Under Multi-level Topology Strategy
- Mechanical Science and Technology for Aerospace Engineering Vol. 45, Issue 2, Pages: 308-315(2026)
- 作者机构：
  
  1. 西南交通大学机械工程学院,成都,610036
  2. 西南交通大学唐山研究院,河北,唐山,063000
- 作者简介：
- 基金信息：
- DOI：10.13433/j.cnki.1003-8728.20240015
  CLC：
- Published：2026
- 稿件说明：
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李佚非, 卢耀辉, 宋承裕, et al. Modal and Lightweight Optimization of Railway Passenger Carbody Under Multi-level Topology Strategy[J]. Mechanical Science and Technology for Aerospace Engineering, 2026, 45(2): 308-315.
DOI：

李佚非, 卢耀辉, 宋承裕, et al. Modal and Lightweight Optimization of Railway Passenger Carbody Under Multi-level Topology Strategy[J]. Mechanical Science and Technology for Aerospace Engineering, 2026, 45(2): 308-315. DOI： 10.13433/j.cnki.1003-8728.20240015.

摘要

为提升铁道客车静动态性能以及满足轻量化需求，以25T型客车车体为研究对象，基于模态分析制定多层级拓扑优化策略，采用折衷规划法建立车体静动态性能的多目标拓扑优化模型，进一步通过层次分析法确定权重系数，最后对车体进行先整体后局部拓扑优化。结果表明，各低阶弹性模态频率均有所提升，其中一阶菱形与垂弯模态频率分别提升了0.74 Hz和0.30 Hz，质量减少196.7 kg，最大应力下降7.03%。表明了多层级拓扑优化策略下的多目标优化对车体性能提升及轻量化是可行有效的。

Abstract

In order to improve the static and dynamic performance of railroad passenger cars and meet the needs of lightweight

this paper takes the 25T passenger carbody as the research object

the multi-level topology optimization strategy is established based on modal analysis

and a multi-objective topology optimization model considering static and dynamic performance is established by using compromise programming method

and the weight coefficients are determined by analytic hierarchy process (AHP)

the carbody is optimized first as a whole and then in a sub-regional local topology optimization. The results show that the frequency of each low order elastic mode is increased

in which the frequencies of the first order rhomboid and the first order vertical bending mode increase by 0.74 Hz and 0.30 Hz

respectively; the mass of carbody decreases by 196.7 kg

and the maximum stress on the carbody decreases by 7.03%. It is shown that the multi-objective optimization under the multi-level topology optimization strategy is feasible and effective for improving the performance and lightweight of the railroad passenger carbody.

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