铁路货车降压风缸连接管疲劳失效分析  

Failure Analysis of Fatigue of Connecting Pipe of Pressure Reducing Cylinder for Railway Wagons

作　　者：李敬民 LI Jingmin(Wuxi Depot,China Railway Urumqi Group Co.,Ltd.,Urumqi 830023,China)

机构地区：[1]中国铁路乌鲁木齐局集团有限公司乌鲁木齐西车辆段,新疆乌鲁木齐830023

出　　处：《铁道车辆》2025年第2期203-207,共5页Rolling Stock

摘　　要：详细介绍了FKM疲劳评估方法分析流程,该方法综合考虑材料、构件尺寸、设计、载荷、安全系数等因素,对构建的疲劳校核过程进行全面修正,最终采用利用度对结构的安全性进行评估。针对某铁路货车降压风缸连接管疲劳失效问题,运用有限元手段与FKM规范相结合的方法对疲劳失效位置进行了强度评估。分析结果表明,风管与降压缸连接位置的利用度超过1,材料发生失效,与实际失效情况相符。This paper presents in detail the analysis process for the fatigue evaluation method specified in the FKM standard.The method comprehensively considers materials,component size,design,load,safety factor,and other factors,revises the fatigue verification process of the construction,and ultimately assesses the safety of the structure through utilization.In order to deal with the fatigue failure issue,this paper evaluates the strength at the fatigue failure position by combining finite element method with FKM standard.The analysis results indicate that the utilization degree of the connection position between the air duct and the pressure reducing cylinder surpasses 1,resulting in material failure,which is consistent with the actual failure.

关 键 词：降压风缸连接管 疲劳失效 FKM规范 有限元分析 

分 类 号：U270.35[机械工程—车辆工程]