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Date of Publication:2009-01-01

Journal:振动与冲击

Affiliation of Author(s):建设工程学部

Issue:8

Page Number:180-183

ISSN No.:1000-3835

Abstract:When using the trigonometric series method to generate artificial seismic wave, the usually appearing problem is that the method can not account for the local defect of seismic wave. The process of generation was analyzed and the defects of trigonometric series method were demonstrated. Wavelet functions were employed to transform the target power spectrum and the high frequency wavelet bases multiplied by cosine function with random phase were adopted to generate artificial seismic wave. How to calculate the target power spectrum more accurately was explained. An example was given to illustrate the better properties of the new method the effects of different wavelet bases to generate artificial seismic wave were compared. The conclusion is that Daubechies wavelet Db4 is better than Daubechies wavelet Db1 to generate artificial seismic wave, and increasing the layers of wavelet function can not improve the precision.

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