Structural Modal Parameter Identification Method Based on the Delayed Transfer Rate Function under Periodic Excitations

The dynamic response transfer rate function (TRF) is increasingly used in the field of structural modal parameter identification because it does not depend on white noise assumption excitation. In this paper, interference periodic excitation using TRF analyzed theoretically for a class civil engineering structures with obvious components excitation, and then an method real parameters proposed. First, delayed constructed, pseudo-frequency further obtained to identify spurious poles whole system. Then, effective structure achieved by comparing system identified via conventional TRF. Finally, feasibility robustness proposed were verified calculation example four-degrees-of-freedom addition, under effectively taking pumping station as example, results show that accurately when contained components, which has wider prospects technical applications.