Nonlinear finite element analysis on the wind-induced vibration of a tension suspension-braced transmission structure

被引：0
|
作者：
Li Z. [1 ,2 ]
Wang B. [1 ]
Wang T. [3 ,4 ]
机构：
[1] School of Civil Engineering, Chongqing University, Chongqing
[2] Chongqing Key Laboratory of Wind Engineering and Wind Resources Utilization, Ministry of Education, Chongqing University, Chongqing
[3] School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin
[4] Chongqing Research Institute of Harbin Institute of Technology, Harbin Institute of Technology, Chongqing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 02期
关键词：
nonlinear finite element; suspension-braced; transmission structure; wind-induced vibration;
D O I：
10.13465/j.cnki.jvs.2024.02.008
中图分类号：
学科分类号：
摘要：
The tension suspension-braced transmission structure is a new type of transmission structure suitable for mountainous terrain, and is quite sensitive to wind loading. In this regard, a nonlinear finite element analysis model for the wind-induced vibration was proposed for the transmission structure, and the wind-induced vibration response of the structure was analyzed. Firstly, the tangent stiffness matrix of the three-dimensional rod element for the bracing suspension and transmission line, considering the geometric nonlinearity of structure, was derived by virtue of the relationship between the element strain energy and its displacement. Subsequently, the element mass matrix and damping matrix of the bracing suspension and transmission line, as well as the element nodal load vector obtained by the wind load equivalent method were obtained. Then, based on the nonlinear finite element theory, the nonlinear dynamic equation for the wind-induced vibration of the tension suspension-braced transmission structure was established and solved by the Newmark-yS method combined with the Newton-Raphson iterative method. Finally, a two-span tension suspension-braced transmission structure was selected as an example, and the wind-induced nonlinear vibration was analyzed by using the proposed model. The results show that: the proposed model has high computational accuracy and efficiency. The low order natural frequency of the suspension-braced conductor part is lower than that of the suspension-braced ground line part. The transmission line displacement response of the structure is greatly affected by wind load. The wind speed and wind direction angle have significant effects on the lateral displacement and the suspension tension of the transmission line. © 2024 Zhendong yu Chongji/Journal of Vibration and Shock. All rights reserved.
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页码：71 / 78and290
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