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research-article

Study on Wind-induced Vibration Behaviour of Railway Catenary in Spatial Stochastic Wind Field Based on Nonlinear Finite Element Procedure

[+] Author and Article Information
Yang Song

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
y.song_gabrielle@outlook.com

Zhigang Liu

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
liuzg_cd@126.com

Fuchuan Duan

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
duanfc_cd@163.com

Xiaobing Lu

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
hello.lxb@163.com

Hongrui Wang

Section of Road and Railway Engineering, Delft University of Technology, Delft 2628CN, The Netherlands
soul_wang0@163.com

1Corresponding author.

ASME doi:10.1115/1.4037521 History: Received January 15, 2017; Revised July 06, 2017

Abstract

Due to its long-span structure and large flexibility, an electrified railway catenary is very sensitive to environmental wind load, especially the time-varying stochastic wind, which may lead to a strong forced vibration of contact line and deteriorate the current collection quality of the pantograph-catenary system. In this paper, in order to study the wind-induced vibration behaviour of railway catenary, a nonlinear finite element procedure is implemented to construct the model of catenary, which can properly describe the large nonlinear deformation and the non-smooth nonlinearity of dropper. The spatial stochastic wind field is developed considering the fluctuating winds in along-wind, vertical-wind and cross-wind directions. Using the empirical spectrums suggested by Kaimal, Panofsky and Tieleman, the fluctuating wind velocities in three directions are generated considering the temporal and spatial correlations. Based on fluid-induced vibration theory, the model of fluctuating forces acting on catenary are developed considering the spatial characteristics of catenary. The time-domain and frequency-domain analyses are conducted to study the wind-induced vibration behaviour with different angles of wind deflection, different angles of attack as well as different geometries of catenary. The effect of spatial wind load on contact force of pantograph-catenary system is also investigated.

Copyright (c) 2017 by ASME
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