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Transmission tower damage recognition method

A technology for damage identification and transmission towers, which is applied in the testing of measuring devices, instruments, machines/structural components, etc., can solve the problems of low accuracy and difficulty in meeting the accuracy requirements of transmission tower structure damage identification, and achieve strong identification ability, accurate identification of minor damage, and the effect of overcoming measurement noise

Inactive Publication Date: 2018-05-22
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The invention provides a damage identification method for transmission towers, which solves the problem that the accuracy of identification of damages to transmission tower structures is not high at present only relying on the mode shape and frequency of transmission towers, and it is difficult to meet the requirements for identification of transmission tower structure damage in engineering practice. Technical Issues with Accuracy Requirements

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Embodiment Construction

[0044] The embodiment of the present invention provides a transmission tower damage identification method, which is used to solve the problem that the accuracy of identifying the damage of the transmission tower structure is not high only by the mode shape and frequency of the transmission tower, and it is difficult to meet the requirements of the transmission tower structure in engineering practice. Technical issues of the accuracy requirements for damage identification.

[0045] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments o...

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Abstract

The invention discloses a transmission tower damage recognition method, so as to solve the technical problem that the accuracy of recognizing the damage of a transmission tower structure by only depending on the vibration mode and the frequency of the transmission tower at present is not high, and the accuracy requirements for damage recognition of the transmission tower structure in engineering practice are hard to meet. The method comprises steps: the vibration modes before and after damages of multiple places of the transmission tower structure are acquired, and according to the vibration modes before and after damages of multiple places of the transmission tower structure, a vibration mode curvature difference before and after the damages of multiple places of the transmission tower structure is calculated; the vibration mode curvature difference before and after the damages of multiple places of the transmission tower structure is subjected to wavelet transform, a corresponding wavelet coefficient is acquired, and the information source of the vibration mode curvature difference before and after the damages of multiple places of the transmission tower structure in a wavelet domain is calculated and acquired according to the wavelet coefficient, wherein the information source are multidimensional vectors formed by change energy before and after the damages of multiple places of the transmission tower structure; and according to the information source, the damage possibilities of the multiple places of the transmission tower structure are solved respectively, and a damage recognition result of the transmission tower structure is acquired.

Description

technical field [0001] The invention relates to the technical field, in particular to a method for identifying damage to transmission towers. Background technique [0002] In the transmission network of the power system, during the long-term use of the transmission tower structure, damages such as aging, corrosion and structural looseness will inevitably occur. When these damages occur, the vibration characteristics of the transmission tower structure will inevitably change. In the actual structural health monitoring of transmission towers, since the mode shapes and frequencies of transmission towers can be obtained directly from modal tests, and have a certain recognition accuracy, they have been widely used. However, at present, the accuracy of identifying the damage of the transmission tower structure only by the mode shape and frequency of the transmission tower is not high, and it is difficult to meet the accuracy requirements of the damage identification of the transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/00
Inventor 杨毅刘石高庆水张楚田丰蔡笋
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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