Journal
SMART STRUCTURES AND SYSTEMS
Volume 9, Issue 1, Pages 55-70Publisher
TECHNO-PRESS
DOI: 10.12989/sss.2012.9.1.055
Keywords
frequency response function; dynamic stiffness matrix; receptance; damping matrix; minimization
Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2009-0066266]
- National Research Foundation of Korea [2009-0066266] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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It is not easy to experimentally obtain the FRF (Frequency Response Function) matrix corresponding to a full set of DOFs (degrees of freedom) for a dynamic system. Utilizing FRF data measured at specific positions, with DOFs less than that of the system, as constraints to describe a damaged system, this study identifies parameter matrices such as mass, stiffness and damping matrices of the system, and provides a damage identification method from their variations. The proposed parameter identification method is compared to Lee and Kim's method and Fritzen's method. The validity of the proposed damage identification method is illustrated in a simple dynamic system.
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