Electric Power ›› 2021, Vol. 54 ›› Issue (2): 18-26.DOI: 10.11930/j.issn.1004-9649.202005045

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Development and Prospect of Structure Health Monitoring Technologies for Bolted Joints of Transmission Towers

ZHANG Wuneng1, WANG Yi2, ZHANG Liubin1, WU Kehua1, WANG Xiaochen1   

  1. 1. Henan Jiuyu Enpai Power Technology Co., Ltd., Zhengzhou 450000, China;
    2. Electric Power Research Institute, State Grid Henan Electric Power Co., Ltd., Zhengzhou 450000, China
  • Received:2020-05-08 Revised:2020-12-02 Published:2021-02-06
  • Supported by:
    This work is supported by National Natural Science Foundation of China (Buckling/Vibrational Mode Transitions and Bifurcation of Heated Panels in Hypersonic Airflow, No.12002280)

Abstract: The bolted joints of transmission towers in service are subjected to the environmental random static/dynamic loading, frequently leading to the reduction or loosening of pre-tightening stress, and as a result reducing the total bearing capacities of transmission towers. Therefore, it is of great significance for the safety and reliability of the transmission towers to develop the structure health monitoring (SHM) technology. We make a review on the research progress of several typical SHM technologies for bolted joints, including technologies based on the dynamics theory, guided wave theory, acoustoelasticity effect and computer vision technology. Their basic principles and development status are introduced and discussed. Finally the DHM technologies for the transmission tower bolted joints are summarized and prospected.

Key words: transmission tower, bolted joints, structure health monitoring, loosening status, acoustoelasticity effect, computer vision