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Indexed by:期刊论文

Date of Publication:2009-08-01

Journal:COASTAL ENGINEERING

Included Journals:SCIE、EI

Volume:56

Issue:8

Page Number:810-830

ISSN No.:0378-3839

Key Words:Wavelet transform; Platform; Multi-component seismic response

Abstract:A wavelet energy method is presented to search the critical incidence of earthquake excitation in a multidimensional seismic response of offshore platforms. The total effective energy and the instantaneous effective energy input rate of an earthquake can be obtained by wavelet transformation to predict the critical incidence of the earthquake and then the maximum dynamic response of the platform can be calculated. The critical incidence is determined using this method for an actual platform and a group of single degree-of-freedom systems. Numerical results show that the application of wavelet transform in a multi-dimensional seismic response of structures is convenient and reliable. (C) 2009 Elsevier B.V. All rights reserved.