Simulation Method for Stitch Wire Vibration Load and Fatigue Life

Impact Factor:2.6

Affiliation of Author(s):西南交通大学

Journal:International Journal of Simulation Modelling

Place of Publication:斯洛文尼亚

Key Words:High-Speed Railway; Stitch Wire; Vibration; Fatigue Life; Simulation Model; FRICTION

Abstract:Stitch wire is the key component in high-speed railway catenary. During the construction and operation of the catenary, tension changes can lead to fracture of the stitch wire. This study proposed a simulation method considering the structure and stress distribution of stitch wire to reveal the effect of tension changes on the fatigue life. Dynamic simulation model at a speed of 300 km/h was constructed to obtain the vibration load. A refined model of stitch wire was used to simulate the contact between the structures. Finally, the fatigue life of stitch wire was calculated when the tension changes by analysing the stress distribution under vibration. Results demonstrate that the lifting effect of the pantograph during operation causes vertical vibrations of stitch wire, and the stress concentration position is located at the connection with its clamp. As the tension increases form 2.0 kN to 5.0 kN, the range of vibration angle at the clamp decreases from 2.73 degrees to 1.33 degrees, and fatigue life increases from 1.36 x 106 to 8.76 x 106. The proposed method provides an accurate approach to simulate the load and fatigue life of stitch wire under real working conditions.

Co-author:Liu, J. D., Chen, Wu, J. Q., Han, F., Guan, J. F. (刘继冬,chenjunqing,wujiqin,韩峰,关金发)

First Author:Liu, J. D. (刘继冬)

Indexed by:SCI

Correspondence Author:Guan, J. F.(关金发)

Discipline:Engineering

First-Level Discipline:Transportation Engineering

Volume:22

Issue:4

Page Number:643-654

ISSN No.:1726-4529

Translation or Not:yes

Date of Publication:2023-09-01