铁道科学与工程学报2025，Vol.22Issue(1)：66-76,11.DOI:10.19713/j.cnki.43-1423/u.T20240985
热力耦合作用下高速列车橡胶球铰疲劳耐久性评估方法
Fatigue durability analysis methodology of rubber spherical hinges in high-speed trains under thermal-mechanical coupling
摘要
Abstract
To improve the accuracy of fatigue durability analysis for key rubber components in high-speed train bogies under operational conditions,a study on the fatigue durability of rubber spherical hinges under thermal-mechanical coupling was conducted.Focusing on a specific model of high-speed train bogie,a high-speed train vehicle dynamics model was established by using the multi-body dynamics method.The load history data of the rubber spherical hinge of the bogie arm at various driving speed were extracted,and these data were applied to the load boundary of the finite element model of the rubber spherical hinge to analyze the stress-strain field and its variation under the train operating load history.A program in Fortran language to calculate the heat generation rate of the rubber spherical hinge was developed,assigned it to each rubber element,and set the thermal boundary and load conditions.Using thermal-mechanical coupling methods,the temperature field and thermal-coupled stress-strain field of the rubber spherical hinge were computed,and analyzed its fatigue durability under these conditions.The results indicate that as the operating speed of the high-speed train increases,the impact disturbances between the wheel and rail intensify,leading to higher alternating load frequencies and effective loads on the bogie rubber spherical hinge,which results in increasing the structural stress.When considering the thermal-mechanical coupling effect,the dynamic viscoelasticity of the rubber material under an alternating load excitation causes the heat generation that escalates with increasing train speed,which raises the temperature of the rubber spherical hinge,increases the thermal stress,and significantly reduces the fatigue durability.At a train speed of 400 km/h and an ambient temperature of 25℃,the maximum temperature of the rubber spherical hinge reached 43.14℃.Comparing with the rubber spherical hinge under the same conditions without considering the thermal-mechanical coupling effect,the maximum stress of the one considering such an effect increases by 22.80%,while the fatigue life decreases by 39.11%.The research results can provide the method and reference for improving the accuracy of fatigue durability predictions for the rubber spherical hinges in the train bogies.关键词
橡胶球铰/热力耦合/温度场分析/疲劳耐久性/转向架Key words
rubber spherical bearings/thermal-mechanical coupling/temperature field analysis/fatigue durability/bogie分类
交通工程引用本文复制引用
公衍军,熊伟,由天宇,尹盛文,王中钢..热力耦合作用下高速列车橡胶球铰疲劳耐久性评估方法[J].铁道科学与工程学报,2025,22(1):66-76,11.基金项目
国家重点研发计划项目(2022YFB4300100) （2022YFB4300100）
湖南省科技领军人才项目(2023RC1011) （2023RC1011）
