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A bridge vibration test and dynamic characteristic identification method based on video surveillance

A technology for dynamic characteristics and identification methods, applied in vibration testing, machine/structural component testing, measuring devices, etc., can solve problems such as deviation of results, ineffective and reliable bridge structure vibration testing and dynamic characteristics identification, etc., and achieve simple experimental operation. handy effect

Active Publication Date: 2018-05-08
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

However, the key to the success of this method lies in the elimination of the noise mode. If the influence of the noise cannot be eliminated by certain means, the result will have a large deviation.
[0023] The above methods cannot be effectively and reliably used for bridge structure vibration testing and dynamic characteristic identification due to their respective defects.

Method used

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  • A bridge vibration test and dynamic characteristic identification method based on video surveillance
  • A bridge vibration test and dynamic characteristic identification method based on video surveillance

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Embodiment Construction

[0075] The following combination figure 1 The case shown in and figure 2 The workflow shown in further illustrates the invention.

[0076] see figure 1 and figure 2 , the case cited in the present invention is to observe a suspension bridge using a bridge vibration test and dynamic characteristic identification method based on video monitoring, and realize multi-measuring point dynamic vibration displacement measurement for it, so as to complete its dynamic characteristic identification, specifically The implementation steps are as follows:

[0077] A. System construction, initial configuration and displacement acquisition;

[0078] A1. Determine the number of structural dynamic displacement measurement points on the suspension bridge (1) and the sampling frequency of displacement acquisition, and determine the model of the camera (2), the parameters of the lens (3) and the erection position of the camera;

[0079] A2. Set up the camera and connect it to the computer (4...

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Abstract

A method for bridge vibration testing and dynamic property recognition based on video monitoring comprises a step A of performing system construction, initial configuration and displacement obtaining; a step B of performing multipoint structure dynamic displacement obtaining, continuous collection and storage; a step C of preprocessing displacement time-history data; and a step D of processing free vibration response signals to obtain a modal parameter.

Description

technical field [0001] The invention relates to a method for using a video monitoring device to carry out a vibration test on a bridge structure and using the obtained time history signal to carry out dynamic characteristic identification. Background technique [0002] The safety of bridges is of paramount importance, so vibration testing of them is essential. Bridge vibration testing and dynamic characteristic identification is to use engineering measurement principles, methods and precision measurement technology to measure the motion parameters of bridge target points, and carry out modal analysis on the bridge target point data obtained from each measurement. By comparing the values ​​of the same parameters in the past, a scientific evaluation of the bridge's operating conditions can be made, and corresponding treatment measures or vibration control suggestions can be put forward, so as to achieve the purpose of early warning of bridge structure safety. [0003] For lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 叶肖伟董传智周凌霄詹兴斌丁通
Owner ZHEJIANG UNIV
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