| 英文摘要 |
Structural health monitoring(SHM) is an interdisciplinary research which has been developed on aerospace, mechanical engineering dramatically. However, due to the unsolvable limitations and difficulties on most of the existing methods, the Natural Excitation Technique – Eigen system Realization Algorithm(NExT-ERA) of operational modal analysis(OMA) is used to replace the traditional modal analysis methods in this study. Furthermore, the performance of the proposed SHM system is enhanced by introducing the Wavelet Packet Decomposition(WPD) on the acceleration data recorded. The performance of the developed algorithm was verified by the shake table database from National Center for Research on Earthquake Engineering(NCREE). |
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