Numerical analysis on aeolian vibration of transmission lines with Stockbridge dampers |
| |
| Authors: | LI Li KONG De-yi LONG Xiao-hong and FANG Qin-han |
| |
| Institution: | 1. Hubei Key Laboratory of Control Structure, Huazhong University of Science and Technology, Wuhan 430074, P.R.China
2. Hubei Key Laboratory of Control Structure, Huazhong University of Science and Technology, Wuhan 430074, P.R.China;Zhongtie Major Bridge Reconnaissance and Design lnstitute Co. Ltd, Wuhan 430050, P.R.China |
| |
| Abstract: | We used computational fluid dynamics (CFD) and mode superposition method instead of the energy balance method to compute transmission line aeolian vibrations induced by the Karman vortex. Firstly, we obtained the wind power inputs using CFD theory. The result is effective for aeolian vibration analyses compared with the power which were measured in wind tunnel tests. Then a new aeolian excitation was derived using the wind power equivalent principle, and the aeolian vibration distribution along transmission lines and the wind power input obtained by CFD can be account. Secondly, we formulated the motion equation of a conductor-damper system and derived a semi-analytial solution using the mode superposition method. The Stockbridge-type dampers attached were simplified to the forces transmitted by the clamps. Finally, the semi-analytical solution can be solved by iterative methods. Taking a 1 000 kV Ultra High Voltage transmission line as an example, we analyzed the line with and without dampers by the semi-analytical solution. Compared with the results which were computed by the energy balance method, the semi-analytical solution is precise enogh for aeolian vibration analyses. Besides, we also analyzed the influence of damper position and quantity. |
| |
| Keywords: | transmission line aeolian excitation Stockbridge-type damper semi-analytical solution computational fluid dynamics |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《重庆大学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《重庆大学学报(英文版)》下载免费的PDF全文 |
