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- W2000457773 abstract "Recently, a new output-only modal identification method based on time-frequency independent component analysis (ICA) has been developed by the authors and shown to be useful for even highly-damped structures. In many cases, it is of interest to identify the complex modes of structures with non-proportional damping. This study extends the time-frequency ICA based method to a complex ICA formulation for output-only modal identification of non-proportionally-damped structures. The connection is established between complex ICA model and the complex-valued modal expansion with sparse time-frequency representation, thereby blindly separating the measured structural responses into the complex mode matrix and complex-valued modal responses. Numerical simulation on a non-proportionally-damped system, laboratory experiment on a highly-damped three-story frame, and a real-world highly-damped base-isolated structure identification example demonstrate the capability of the time-frequency complex ICA method for identification of structures with complex modes in a straightforward and efficient manner." @default.
- W2000457773 created "2016-06-24" @default.
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- W2000457773 date "2015-01-25" @default.
- W2000457773 modified "2023-09-25" @default.
- W2000457773 title "Blind modal identification of output-only non-proportionally-damped structures by time-frequency complex independent component analysis" @default.
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- W2000457773 doi "https://doi.org/10.12989/sss.2015.15.1.081" @default.
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