Modal identification with uncertainty quantification of large‐scale civil structures via a hybrid operation modal analysis framework
Mengmeng Sun,
Qiusheng Li
Abstract:SummaryIn operational modal analysis (OMA), only structural responses are typically available. In this context, bias and variance (uncertainty) errors may exist in modal estimates (especially damping estimates), resulting in inaccurate determination of the modal properties of large‐scale structures under harsh excitations. To this end, a hybrid OMA framework based on the modal decoupling, the natural excitation technique, the random decrement technique (RDT), and improved eigensystem realization algorithm (ERA… Show more
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