Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
511701 | Computers & Structures | 2009 | 13 Pages |
Abstract
A newly improved Hilbert–Huang transform (HHT) algorithm is presented for identification of time-varying systems and analysis of nonlinear structural response with closely spaced modes. In this improved HHT, the auto-correlation function of the structural response is taken as a substitute of input to reduce noise effect. A band-pass filter scheme and an effective intrinsic mode function (IMF) selection principle are combined to overcome the modal perturbation problem. Based on these, a time-varying system identification procedure is developed. Its robustness and effectiveness are verified by both numerically simulated and laboratory measured vibration data on a scaled concrete-steel composite beam model.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
Chunxiao Bao, Hong Hao, Zhong-Xian Li, Xinqun Zhu,