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

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (4) : 30-35.

ZHAO Chao1，ZHAO Jiayu1，SUN Qing1，YUAN Jun2，WANG Huchang2，HE Yuming3，TAN Rong3

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Abstract

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.

Key words

transmission tower / damping ratio / excitation method / modified periodogram algorithm

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ZHAO Chao1，ZHAO Jiayu1，SUN Qing1，YUAN Jun2，WANG Huchang2，HE Yuming3，TAN Rong3. A study on identification of dynamic characteristic parameters of a transmission tower under ambient excitations[J]. Journal of Vibration and Shock, 2021, 40(4): 30-35

References

[1] 中华人民共和国住房和城乡建设部.建筑结构荷载规范：GB 50009—2012[S]. 北京：中国建筑工业出版社, 2012.
Ministry of Housing and Urban-Rural Construction of the People's Republic of China. Load Code for Building Structures: GB 50009-2012[S]. Beijing: China Construction Industry Press, 2012.
[2] Liu Xin, Luo Yong-yao, Karney B W, et al. Virtual testing for modal and damping ratio identification of submerged structures using the PolyMAX algorithm with two-way fluid–structure interactions[J]. Journal of Fluids and Structures, 2015, 54:548-565.
[3] 何敏娟, 马人乐, 黄征. 336m高钢结构电视塔模态参数实测与分析[J]. 同济大学学报（自然科学版）, 2001, 29(7):862-866.
HE Min-Juan, MA Ren-Le, HUANG Zheng. Measurements and Analysis of Model Parameter of Broadcast and Television Steel Tower[J]. Journal of Tongji University, 2001.
[4] Ke S, Yu W, Zhu P,et al. Full-scale measurements and damping ratio properties of cooling towers with typical heights and configurations[J]. Thin-Walled Structures, 2018, 124:437-448.
[5] 杨风利, 张宏杰, 杨靖波，等. 脉动风激励下格构式输电塔
动力特征识别[J]. 振动与冲击, 2017(21):151-156.
YANG Feng-li, ZHANG Hong-jie, YANG Jing-bo, et al. Identification of the dynamic properties of a transmission line lattice tower under ambient excitations[J]. Journal of Vibration & Shock, 2017.
[6] 沈国辉,项国通,邢月龙，等. 基于EEMD分解的输电塔阻尼特性识别[J].振动与冲击,2014,33(21):38-43+50.
SHEN Guo-hui, XIANG Guo-tong, XING Yue-long,et al. Identification of damping characteristics of transmission towers using EEMD[J]. Journal of Vibration & Shock, 2014,33(21):38-43 and 50.
[7] Jesus S. ML Estimation and Detection of Multiple Frequencies Through Periodogram Estimate Refinement[J]. IEEE Signal Processing Letters, 2017, 24(3):249-253.
[8] Djukanovic S. An Accurate Method for Frequency Estimation of a Real Sinusoid[J]. IEEE Signal Processing Letters, 2016, 23(7):915-918.
[9] Beheshti S , Ravan M , Reilly J P , et al. Mean-Square Error in Periodogram Approaches With Adaptive Windowing[J]. IEEE Transactions on Signal Processing, 2011, 59(3):923-935.
[10] 陈国良, 林训根, 岳青，等. 基于时间序列分析的桥梁长期挠度分离与预测[J]. 同济大学学报(自然科学版), 2015, 44(6):962-968.
Chen Guo-liang, Lin Xun-gen, Yue Qing, et al. Study on separation and forecast of long-term deflection based on time series analysis[J]. Journal of Tongji University, 2016.
[11] Chintakindi S R, Varaprasad O V S R, Sarma D V S S S. Improved Hanning window based interpolated FFT for power harmonic analysis[C]// Tencon IEEE Region 10 Conference. IEEE, 2016.
[12] Mevada H, Patel D. Experimental Determination of Structural Damping of Different Materials[J]. Procedia Engineering, 2016, 144:110-115.