Original scientific paper

https://doi.org/10.21278/TOF.483058823

Analysis of Stick-Slip Characteristics of an Inclined Frictional Contact System

Shiyu Liu ; The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Shanghai, China; Institute of Rail Transit, Tongji University, Shanghai, China; Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd., Shanghai, China; Shanghai Engineering Research Centre of Tramway, Shanghai, China
Zhiqiang Wang ; Institute of Rail Transit, Tongji University, Shanghai, China *
Zhenyu Lei ; Institute of Rail Transit, Tongji University, Shanghai, China

* Corresponding author.

Abstract

For the purpose of investigating the stick-slip characteristics of the inclined frictional contact interface, a three-dimensional numerical model of a slider-substrate inclined frictional contact system is constructed by using the finite element method, and the state of stick-slip distribution and the dynamic response characteristics of the contact surface are analysed to elucidate the specific vibration mechanism. Combined with the parametric analysis, the control suggestions for the stick-slip vibration are given. The results show that, when the relative motion of the contact interface between the slider and the substrate occurs, the contact surface transitions from the stick-slip state to the slip state. The vibration mechanism of the system can be described as the unsteady vibration form combining stick-slip vibration in the initial stage and slip vibration in the middle and later stages. Compared to the planar frictional contact system, the inclined frictional contact system does not show the stable slip vibration, which is related to the fact that the inclined frictional contact system always has the downward force component along the inclined surface. The parametric analysis reveals that an appropriate reduction in the concentrated force, spring stiffness and frictional coefficient and an increase in the damping coefficient and the base angle can effectively moderate the vibration degree of the slider-substrate system.

Keywords

inclined friction; stick-slip characteristics; finite element method; vibration mechanism; parametric analysis

Hrčak ID:

319758

URI

https://hrcak.srce.hr/319758

Publication date:

19.6.2024.

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