An abnormal carbody swaying of intercity EMU train caused by low wheel-rail equivalent conicity and damping force unloading of yaw damper

作     者：Yixiao Li Maoru Chi Zhaotuan Guo Shulin Liang Yixiao Li;Maoru Chi;Zhaotuan Guo;Shulin Liang

作者机构：State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China 

出 版 物：《Railway Engineering Science》 (铁道工程科学（英文版）)

年 卷 期：2023年第31卷第3期

页      面：252-268页

核心收录：

学科分类：08[工学] 082304[工学-载运工具运用工程] 080204[工学-车辆工程] 0802[工学-机械工程] 0823[工学-交通运输工程] 

基　　金：supported by the National Key R&D Program of China under grant number 2018YFB1201701 

主　　题：Low-frequency carbody swaying Intercity EMU Equivalent conicity Damping characteristics Test verification 

摘      要：Low-frequency carbody swaying phenomenon often occurs to railway vehicles due to hunting instability,which seriously deteriorates the ride comfort of *** paper investigates low-frequency carbody swaying through experimental analysis and numerical *** the tests,the carbody acceleration,the wheel-rail profiles,and the dynamic characteristics of dampers were measured to understand the characteristics of the abnormal carbody vibration and to find out its primary *** and nonlinear numerical simulations on the mechanism and optimization measures were carried out to solve this carbody swaying *** results showed that the carbody swaying is the manifest of carbody hunting *** low equivalent conicity and the decrease of dynamic damping of the yaw damper are probably the cause of this *** optimization measures to increase the equivalent conicity and dynamic damping of the yaw damper were put forward and verified by on-track *** results of this study could enrich the knowledge of carbody hunting and provide a reference for solving abnormal carbody vibrations.