Study on Dynamic Modeling and Damping Characteristics of Vehicle-track Coupling Considering Resilient Wheelset

doi:10.3901/JME.2023.08.235

Abstract

Abstract: As a kind of wheelset structure to reduce vibration and noise, resilient wheelset is usually used in rail transit systems such as trams, which have high requirements for vibration and noise. Because of the complex structure of the resilient wheelset, the establishment of an ideal dynamic model has become the focus and difficulty in the study of the resilient wheelset. The vehicle-track spatial coupling dynamic model of the resilient wheelset is established, and the resilient wheelset is decoupled into three parts: the wheel core, the left rim and the right rim, each of which considers 6 degrees of freedom, and the core and rims are connected by a rubber layer. The track system is considered as a multi-layer structure of rail-slab-roadbed, and the rail is simulated by Timoshenko beam. The dynamics and damping characteristics of resilient wheelset vehicle and ordinary wheelset vehicle under random spectrum and impact conditions are compared and analyzed, the load characteristics of rims are analyzed, and the influence of equivalent stiffness of rubber layer on wheel-rail force and axle box acceleration is investigated. The results show that the dynamic and damping performance of the resilient wheelset is better than that of the ordinary wheelset, and the wheel-rail force, axle box acceleration and the equivalent stiffness of the rubber layer are obviously nonlinear. The model and related conclusions established provide theoretical reference for the modeling and optimization of resilient wheelsets.

Key words: resilient wheel, vehicle-track coupling dynamics, dynamic performance

CLC Number:

U260

WANG Jia-nuo, WANG Qi, HAN Jian, XIAO Xin-biao, JIN Xue-song. Study on Dynamic Modeling and Damping Characteristics of Vehicle-track Coupling Considering Resilient Wheelset[J]. Journal of Mechanical Engineering, 2023, 59(8): 235-244.

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