摘要
随着动力集中动车组(动集)的广泛应用,车内插座面板作为乘客用电关键接口,其结构完整性对用电安全至关重要。近期检修发现,动集插座面板出现大面积表面裂纹,不仅影响美观,还可能导致插座接触不良、漏电等问题,危及旅客的人身安全和设备使用安全。现有研究多局限于单一因素分析,缺乏对多应力耦合作用下裂纹演化机制的系统性研究。文章以动集插座面板裂纹问题为核心,通过现场分解检修、数据统计、三维建模技术及应力仿真分析,开展了裂纹成因与动态演化规律的系统性研究。结果表明:动集插座面板裂纹主要由座椅插座安装座结构设计缺陷所致,其中插座面板应力集中区域(如螺栓孔、USB插口附近)为裂纹萌生与扩展的关键部位。首次建立了动集插座面板应力仿真的裂纹演化模型,揭示了插座面板裂纹扩展机制,突破了单一因素分析的局限性。研究成果为动集插座面板的可靠性设计与维护提供了新的技术路径,对保障动车组电气安全具有应用价值。
With the widespread application of concentrated power EMUs,the internal power socket panel,as a critical interface for passenger electricity use,has become crucial for electrical safety.Recent maintenance inspections have revealed extensive surface cracks on these socket panels,which not only affect aesthetics but may also lead to poor contact,leakage,and other issues,endangering passenger safety and equipment operation.Existing research has largely been confined to single-factor analyses,lacking systematic investigation into the crack evolution mechanism under multi-stress coupling.This article focuses on the crack issue in EMU socket panels.Through on-site disassembly,data statistics,three-dimensional modeling technology,and stress simulation analysis,systematic research was conducted on crack causes and dynamic evolution patterns.The results indicate that cracks in the EMU socket panel are primarily caused by structural design flaws in the seat socket mounting base.Stress concentration areas on the panel,such as near screw holes and USB ports,are key locations for crack initiation and propagation.For the first time,a crack evolution model for stress simulation of EMU socket panels has been established,revealing the crack propagation mechanism and breaking through the limitations of single-factor analysis.The research outcomes provide a new technical pathway for the reliability design and maintenance of EMU socket panels,holding application value for ensuring EMU electrical safety.
作者
杜正涌
孙宝德
徐树林
DU Zhengyong;SUN Baode;XU Shulin(Kunming Depot of China Railway Kunming Group Co.,Ltd.,Kunming 650050,China)
出处
《铁道车辆》
2026年第2期161-168,共8页
Rolling Stock
