地震学报（英文版）2007，Vol.20Issue(4)：370-380,11.
Construction of constant-Q viscoelastic model with three parameters
Construction of constant-Q viscoelastic model with three parameters
摘要
Abstract
The popularly used viscoelastic models have some shortcomings in describing relationship between quality factor (Q) and frequency, which is not consistent with the observation data. Based on the theory of viscoelasticity, a new approach to construct constant-Q viscoelastic model in given frequency band with three parameters is developed. The designed model describes the frequency-independence feature of quality factor very well, and the effect of viscoelasticity on seismic wave field can be studied relatively accurate in theory with this model. Furthermore, the number of required parameters in this model has been reduced fewer than that of other constant-Q models, this can simplify the solution of the viscoelastic problems to some extent. At last, the accuracy and application range have been analyzed through numerical tests. The effect of viscoelasticity on wave propagation has been briefly illustrated through the change of frequency spectra and waveform in several different viscoelastic models.关键词
viscoelastic medium/ quality factor/ theoretical model/ seismic waveKey words
viscoelastic medium/ quality factor/ theoretical model/ seismic wave分类
天文与地球科学引用本文复制引用
SUN Cheng-yu,YIN Xing-yao..Construction of constant-Q viscoelastic model with three parameters[J].地震学报（英文版）,2007,20(4):370-380,11.基金项目
Shandong Foundation for Talent Young Scientists (02BS123) （02BS123）
