A study on identification of dynamic characteristic parameters of a transmission tower under ambient excitations

被引：0
|
作者：
Zhao C. [1 ]
Zhao J. [1 ]
Sun Q. [1 ]
Yuan J. [2 ]
Wang H. [2 ]
He Y. [3 ]
Tan R. [3 ]
机构：
[1] School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an
[2] Northwest Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group, Xi'an
[3] Shannxi Electric Power Design Institute Co., Ltd., China Energy Engineering Group, Xi'an
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 04期
关键词：
Damping ratio; Excitation method; Modified periodogram algorithm; Transmission tower;
D O I：
10.13465/j.cnki.jvs.2021.04.005
中图分类号：
学科分类号：
摘要：
The dynamic parameters of a transmission tower are the important basis for wind resistance design and the value of damping ratio has significant influence on the calculation of wind vibration coefficient. A typical transmission tower with hanging line was adopted an ambient excitation method and an artificial excitation method. The modified periodogram algorithm was used to remove the interference of noise signal of the measured data. Based on the peak frequency coherence above 95%, the half-power bandwidth method was adopted to identify the frequency and damping ratio. The results show that the modified periodogram algorithm has obvious denoising effect on the measured data signals, which greatly reduces the deviation generated in the damping ratio identification process. The dynamic parameters of the transmission tower can be accurately identified by ambient excitation. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：30 / 35
页数：5
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