Open Access

ARTICLE

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

Meng Zhang¹, Zhichao Zhou¹, Guifeng Zhao^1,*, Fangfang Wang^2,*
1 School of Civil Engineering, Zhengzhou University, Zhengzhou, 450001, China
2 Henan Vocational College of Mechanical and Electrical, Zhengzhou, 451192, China
* Corresponding Authors: Guifeng Zhao. Email: ; Fangfang Wang. Email:
(This article belongs to this Special Issue: Vibration Control and Utilization)

Computer Modeling in Engineering & Sciences 2023, 134(1), 673-698. https://doi.org/10.32604/cmes.2022.021463

Received 15 January 2022; Accepted 04 March 2022; Issue published 24 August 2022

Abstract

Computational fluid dynamics (CFD) and the finite element method (FEM) are used to investigate the wind-driven dynamic response of cantilever traffic signal support structures as a whole. By building a finite element model with the same scale as the actual structure and performing modal analysis, a preliminary understanding of the dynamic properties of the structure is obtained. Based on the two-way fluid-structure coupling calculation method, the wind vibration response of the structure under different incoming flow conditions is calculated, and the vibration characteristics of the structure are analyzed through the displacement time course data of the structure in the cross-wind direction and along-wind direction. The results show that the maximum response of the structure increases gradually with the increase of wind speed under 90° wind direction angle, showing a vibration dispersion state, and the vibration response characteristics are following the vibration phenomenon of galloping; under 270° wind direction angle, the maximum displacement response of the structure occurs at the lower wind speed of 5 and 6 m/s, and the vibration generated by the structure is vortex vibration at this time; the displacement response of the structure in along-wind direction increases with the increase of wind speed. The along-wind displacement response of the structure will increase with increasing wind speed, and the effective wind area and shape characteristics of the structure will also affect the vibration response of the structure.

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Keywords

Signal structure; modal analysis; wind-induced vibration; two-way fluid-structure interaction; numerical simulation

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