Influence of low-frequency yaw damper dynamic stiffness on carbody hunting instability of high-speed freight wagons

Pengcheng Zeng, Liangcheng Dai, Maoru Chi, Yiping Jiang, Jianfeng Sun, State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, s Republic of China, Rail Transportation Unit, Zhuzhou Times New Material Technology Co, s Republic of China, School of Engineering, Zhejiang Normal University, s Republic of China

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit

Published online on March 25, 2026

Abstract

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, Ahead of Print.
With increasing operational speeds, high-speed freight wagons rely on yaw dampers to enhance vehicle stability. However, improper vehicle-damper parameter matching can induce severe low-frequency carbody hunting instability. This study investigates the ...