Application of Improved Perturbation Theory to Bridge Damage Identification

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Wu, Duo^1 ; Yin, Yuxue^1 ; Liu, Laijun^2

Department of Civil Engineering, Nanchang Institute of Technology, Nanchang Jiangxi

330029, China^1

School of Highway, Chang'An University, Xi'an

710064, China^2

关键词: Calculation process;    Damage Identification;    Identification accuracy;    Identification process;    Perturbation method;    Perturbation theory;    Rayleigh quotients;    Vibration noise;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/3/032045/pdf
DOI  :  10.1088/1755-1315/199/3/032045

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper introduces two new methods-William B.B. perturbation method and Rayleigh quotient method-into damage identification of local unit of bridges. Taking the structure of a truss bridge as the practical example, the author made detailed analysis of these two methods' function in damage identification by programming the corresponding calculation process and adding vibration noise to the identification process. The results showed that William B.B. method could more easily generate the perturbation accuracy values and that Rayleigh quotient method had the advantage of higher identification accuracy, simpler calculation and better resistance to noise.