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http://dx.doi.org/10.5139/JKSAS.2003.31.3.031

Inverse Perturbation Method and Sensor Location for Structural Damage Detection  

Park, Yun Cheol (인하대학교)
Choe, Yeong Jae (인하대학교)
Jo, Jin Yeon (인하대학교)
Kim, Gi Uk (인하대학교)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.3, 2003 , pp. 31-38 More about this Journal
Abstract
In the present work, a nonlinear inverse perturbation method which has been used in the structural optimization, is adopted so as to identify the structural damages. Unlike the structural optimization, a larger number of constrained equations than the number of unknown parameters are often required detect structural damage. Therefore, nonlinear least squares method is utilized to solve the problem. Because only a limited number of sensors are available I real situation of damage detection, the determination of sensor location becomes one of the most important issues. Hence, this work concentrates on the issue of sensor placement in the framework of nonlinear inverse perturbation method, and the performances of various methodologies concerning to sensor placement are compared with each other. The comparisons show tat the successive elimination method gets good performance for sensor placement. From the several numerical studies, it is confirmed that the inverse perturbation method, combined with the successive elimination method, is very promising in structural damage detection.
Keywords
inverse problem; damage detection; inverse perturbation method; sensor placement; successive elimination; nonlinear least square method;
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