城际动车组牵引拉杆橡胶节点疲劳寿命提升优化研究

Study on Optimization of the Fatigue Life of Traction Rod Rubber Joint for Intercity EMU

文章针对某型牵引拉杆橡胶节点在车辆运营过程中出现的疲劳失效问题,基于城际动车组的线路分析,通过有限元仿真,结合疲劳试验,重新给定了复合疲劳试验工况,并提出了一种产品优化方案。优化后的产品在保证符合各项技术要求的前提下,有效提升了橡胶应力集中区域抗疲劳性能,延缓了橡胶表面的裂损,提高了疲劳寿命,能够满足城际动车组的使用需求。

This article aims at the fatigue failure of a certain type of traction rod rubber joint occurring during the operation of vehicles,and based on the track analysis of intercity EMU and combined with finite element simulation and fatigue test,redefines the composite fatigue test conditions and proposes a product optimization solution.In the premise of satisfying all technical requirements,the optimized product can effectively improve the fatigue resistance of rubber in the area of stress concentration,postpone the cracks on the surface of rubber and increase the fatigue life so as to meet the needs of use of intercity EMU.