Analysis of Wind-Induced Vibration Response in Additional Conductors and Fittings Based on the Finite Element Method

Like Pan, Aobo Yang, Tong Xing, Yuan Yuan (), Wei Wang and Yang Song
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Like Pan: Standards & Metrology Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100015, China
Aobo Yang: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611730, China
Tong Xing: Standards & Metrology Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100015, China
Yuan Yuan: Standards & Metrology Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100015, China
Wei Wang: Standards & Metrology Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100015, China
Yang Song: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611730, China

Energies, 2025, vol. 18, issue 10, 1-19

Abstract: Wind-induced vibrations in additional conductors on electrified railway catenary systems pose a risk to operational safety and long-term structural performance. This study investigates the dynamic response of these components under wind excitation through nonlinear finite element analysis. A wind speed spectrum model is developed using wind tunnel tests and field data, and the autoregressive method is used to generate realistic wind fields incorporating longitudinal, lateral, and vertical components. A detailed finite element model of the additional conductors and fittings was constructed using the Absolute Nodal Coordinate Formulation to account for large deformations. Time domain simulations with the Newmark-β method were conducted to analyze vibration responses. The results show that increased wind speeds lead to greater vibration amplitudes, and the stochastic nature of wind histories significantly affects vibration modes. Higher conductor tension effectively reduces vibrations, while longer spans increase flexibility and susceptibility to oscillation. The type of fitting also influences system stability; support-type fittings demonstrate lower stress fluctuations, reducing the likelihood of resonance. This study enhances understanding of wind-induced responses in additional conductor systems and informs strategies for vibration mitigation in high-speed railway infrastructure.

Keywords: additional conductors; wind-induced vibration; aerodynamics; nonlinear finite element method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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