|Table of Contents|

Rayleigh Wave Dispersion Analysis Based on S Transform(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第03期
Page:
319-323
Research Field:
应用地球物理
Publishing date:

Info

Title:
Rayleigh Wave Dispersion Analysis Based on S Transform
Author(s):
MA Jian-qing1;  LI Qing-chun1;  FAN Jin-sheng2;  WANG Mei-ding2
(1.School of Geological Engineering and Surveying, Chang'an University, Xi'an 710054, Shaanxi, China; 2.Team of Geophysical and Geochemical Exploration, Northwest Bureau of Geology for Non-ferrous Metals,Xi'an 710068, Shaanxi, China)
Keywords:
time-frequency analysis;  S transform;  Rayleigh wave;  dispersion curve
PACS:
P631.4
DOI:
-
Abstract:
Extracting dispersion curve from surface wave is one of the important steps in analyzing surface wave. Because of the limitation of time-frequency analysis, S transform is put forwards to analyzing dispersion of Rayleigh wave and the specific algorithm is shown. Firstly, the method is used to calculate the time difference when two adjacent traces record the same frequency in temporal frequency domain, and secondly, track pitch divided by the time difference is phase velocity of the corresponded frequency. So, it avoids that the method of traditional phase may cause the defect of phase difference in the case of large distance. The method is verified based on theory model and actual data. The results show that it could improve the extraction accuracy of dispersion curves of Rayleigh wave and has some practical.

References:

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Last Update: 2010-09-20