基于运行工况的接触网零部件疲劳寿命分析

Analysis of Fatigue Life of OCS Fittings and Parts under Operation Status

接触网零部件疲劳破坏是接触网常见的故障形式,为减少该类故障的发生,提高维修效率,需预测接触网零部件的疲劳寿命。本文设计了基于运行工况的接触网零部件疲劳寿命分析流程,其中分析工具包括弓网动态仿真平台、支持与定位结构仿真平台和零部件疲劳寿命仿真平台;以京沪高铁某段接触网为分析对象,分析该段接触网零部件的载荷分配,计算支持与定位结构的应力时程,提取零部件的载荷时程,并对比不同支柱定位器的疲劳寿命,得出中心转换柱的定位器疲劳寿命最小值比中间柱的定位器小,且最容易出现疲劳破坏的区域为定位器与定位支座连接处的结论。

The fatigue failure of OCS components is a common OCS failure form, in order to reduce the occurrence of such failures and improve maintenance efficiency, it is necessary to predict the fatigue life of OCS components. In this paper, the fatigue life analysis process of OCS components based on operating conditions is designed. The analysis tools include pantograph-catenary dynamic simulation platform, support and registration structure simulation platform and component fatigue life simulation platform;Taking the OCS of a section of Beijing-Shanghai high-speed railway as the analysis object, the load distribution of OCS components in this section is analyzed, the stress time history of support and registration structure is calculated, the load time history of components is extracted, and the fatigue life of steady arms at different masts is compared. The conclusions are obtained that the minimum fatigue life of the steady arm at the central transition mast is smaller than that of the steady arm at the central mast, and the area where the fatigue damage is prone to occur is at the point of connection between steady arm and registration base.