牵引与制动工况下城市轨道交通车辆结构强度分析方法
于春洋程亚军刘春艳薛宁鑫姜春龙廉帅王家兴
Structural Strength Analysis Method of Urban Rail Transit Vehicle under Traction and Braking Conditions
YU ChunyangCHENG YajunLIU ChunyanXUE NingxinJIANG ChunlongLIAN ShuaiWANG Jiaxing
-
作者信息: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
-
Affiliation:National Engineering Research Center of Railway Vehicles, CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2025.02.015
-
中图分类号/CLCN:U264.4
-
栏目/Col:研究报告
摘要:
［目的］牵引载荷和制动载荷过大，是城市轨道交通车辆牵引梁-枕梁-缓冲梁结构(以下简称“牵枕缓结构”)焊缝产生疲劳裂纹的重要原因之一。为了有效控制车辆结构产生裂纹的可能性，需要在设计阶段对牵引与制动工况下车辆结构强度的分析方法进行深入研究。［方法］以我国某城市轨道交通线路为研究对象，通过线路试验数据分析受力点载荷的相位关系，对牵引与制动工况下载荷的相位测试结果进行分析。在阐述牵引与制动工况下载荷分配理论的基础上，设计了4个有限元模型约束方案，以分析不同方案下的车辆牵枕缓结构强度，对比仿真载荷值与试验载荷值。选取牵枕缓结构与底架焊接的3处主要焊缝，分析了3处焊缝在4个建模方案下的疲劳评估结果。［结果及结论］方案1—方案3下，载荷通过惯性载荷的形式施加，牵引与制动工况下受力点的载荷分配比例、受力方向同列车运行时的载荷分配比例、受力方向不一致。方案4(集中力加载形式)能较好地反映受力点载荷的相位关系及载荷大小。
Abstracts:
［Objective］ Excessive traction and braking loads are significant factors contributing to inducing fatigue cracks in the welded joints of the ′TBB (traction beam-bolster beam-buffer beam) structure′ in urban rail transit vehicles. To effectively mitigate the risk of structural cracking, it is essential to thoroughly investigate the methods for analyzing the structural strength of vehicles under traction and braking conditions during design phase. ［Method］ Taking a specific urban rail transit line in China as the research object, the line test data are analyzed to study the phase relationships of loads at stress points. The phase test results for traction and braking loads are examined. Based on the theoretical load distribution under traction and braking conditions, four finite element model constraint schemes are designed to analyze the strength of the TBB structure in different schemes. Simulated and experimental load values are compared. Three primary welds at the junctions of the TBB structure and the underframe are selected, and the fatigue assessment results of the 3 welds in 4 modeling schemes are analyzed. ［Result & Conclusion］ Under Scheme 1-3, the loads are applied as inertial loads, resulting in dissonance between load distribution proportion and direction at stress points under traction/breaking conditions, and those under train operating conditions. Scheme 4 (concentrated force loading form) can effectively reflect the phase relationship and magnitudes of the loads at the stress points.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 超大规模城市轨道交通网络的车辆高质量运维管理模式
过刊浏览
资料下载
友情链接