Mode Shape Identification Based on Instantaneous Frequency of Moving Vehicle-Bridge System
摘要
A mode shape identification (MSI) approach is developed based on the instantaneous frequency (IF) of moving vehicle-bridge system (VBS) in this study. Firstly, the relational expression between the IF of VBS and the bridge mode shape (MS) is deduced. Then, the system IF is tracked through synchroextracting transform and used to reconstruct MS accordingly. A numerical case is performed to manifest the precision of the proposed approach.