A band-processing algorithm for structural system identification

Abstract

This paper presents a band-processing algorithm for frequency-domain structural system identification. An extension of recent work on the SSID substructure system identification method, it describes a systematic procedure for using frequency response functions that are processed in overlapping frequency bands and then combined to create a global system model of the test structure. A linear, viscousdamped reduced-order system model (M,C, and K) is obtained. Numerical simulations examine the algorithm's ability to identify valid reduced-order structural models. The proposed algorithm promises to be a suitable candidate for implementation on parallel-processing computers.