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An Accelerated Inverse Perturbation Method for Structural Damage Identification  

Park, Young-Jae (Post-Doctoral Researcher, Department of Mechanical Engineering, Inha University)
Lee, Usik (Department of Mechanical Engineering, Inha University)
Publication Information
Journal of Mechanical Science and Technology / v.17, no.5, 2003 , pp. 637-646 More about this Journal
Abstract
In the previous study, the inverse perturbation method was used to identify structural damages. Because all unmeasured DOFs were considered as unknown variables, considerable computational effort was required to obtain reliable results. Thus, in the present study, a system condensation method is used to transform the unmeasured DOFs into the measured DOFs, which eliminates the remaining unmeasured DOFs to improve computational efficiency. However, there may still arise a numerically ill-conditioned problem, if the system condensation is not adequate for numerical Programming or if the system condensation is not recalibrated with respect to the structural changes. This numerical problem is resolved in the present study by adopting more accurate accelerated improved reduced system (AIRS) as well as by updating the transformation matrix at every step. The criterion on the required accuracy of the condensation method is also proposed. Finally, numerical verification results of the present accelerated inverse perturbation method (AIPM) are presented.
Keywords
Damage Detection, Inverse Perturbation Method; System Condensation; Accelerated Improved Reduced System(AIRS); Accelerated Inverse Perturbation Method (AIPM);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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