Automatic modal parametric identification of bridge based on mobile sensing

被引：0
|
作者：
Hu W. [1 ]
Yuan X. [1 ]
Tang D. [1 ]
Xu Z. [1 ]
Lu W. [1 ]
Teng J. [1 ]
机构：
[1] College of Civil and Environment Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 07期
关键词：
automatic modal parametric identification; bridge; mobile sensing; phase synchronization;
D O I：
10.13465/j.cnki.jvs.2023.07.030
中图分类号：
学科分类号：
摘要：
Here, an automatic: modal parametric: identification method of bridge based on mobile sensing was proposed. The mobile sensing unit eould include a power ear and a rigid small trailer. The power car was equipped with data acquisition and transmission equipment and Beidou time service module. The rigid trailer was equipped with vibration acceleration transducers. The connection between the power car and the trailer could have good vibration isolation effect, and effectively obtain vibration signals at different positions of bridge structure itself. During modal tests, the mobile sensing unit could automatically obtain bridge structural vibration information at different measured points in turn, and the phase time synchronization could be realized between bridge vibration information collected on the mobile sensing unit and that obtained on a fixed reference unit through Beidou time service module. The automatic: menial parametric: identification method based on the stochastic subspace method could quickly extract structural modal information from vibration information obtained both on the fixed reference unit and the mobile sensing unit. It was shown that the proposed method can obtain structural vibration information with higher spatial resolution, and then obtain accurate structural vibration modal shape information. The mobile sensing unit was applied in modal tests of a through tied arch bridge to acquire good modal identification effect. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：262 / 266and288
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