The Method of Rayleigh Wave Dispersion Curve Extraction Based on Generalized S-Transform with Variable-Factors
详细信息
- 责任者：Zhou Zhusheng (School of Geosciences and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Yang Pengkai
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：34(5)
- 关键词：瑞雷波 ; Rayleigh waves ; 波频散 ; wave dispersion
- 页码：p.518-522
- 图表：2 illus., 15 refs.
- 分类号：1600
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
摘要
The key step of surface wave data processing is to extract its dispersion curve.As the frequency resolution and time resolution can not be taken into account by S-transform or the generalized S-transform for the whole time samples simultaneously,a new method by using the generalized S-transform with variable-factors to extract dispersion cure of transient Rayleigh wave is present.With the variable-factors,the width of gaussian window versus frequency varies expected,rather than simply narrows frequency increasing.This method can improve the frequency resolution and the time resolution of the local bands with purpose,especially the low and high frequency bands.The results of theoretical model testing and real data trials show that the method of surface wave dispersion curve extraction based on generalized S-transform with variable-factors is feasible and practical.