地球物理学进展 ›› 2012, Vol. ›› Issue (4): 1615-1623.doi: 10.6038/j.issn.1004-2903.2012.04.039
王佳文1, 柴冬梅1, 凡友华2, 刘忠诚1
收稿日期:
2011-09-30
修回日期:
2011-12-05
出版日期:
2012-08-20
发布日期:
2012-08-20
作者简介:
王佳文,女,1984年生,河北沧州人,硕士,助教,主要从事面波理论研究.(E-mail:wjw4056385@163.com)
基金资助:
国家自然科学基金项目(40604012)资助.
WANG Jia-wen1, CHAI Dong-mei1, FAN You-hua2, LIU Zhong-cheng1
Received:
2011-09-30
Revised:
2011-12-05
Online:
2012-08-20
Published:
2012-08-20
摘要: 虽然一些时频分析方法已经被用于频散曲线提取中,但是它们自身时频窗的缺陷使的所得频散曲线信息缺失或错误.本文首次尝试利用广义S变换分析瑞利波的频散特性.以半空间模型为例确定方法的可行性,频散曲线变化准确反映地层变化情况.不同炮检距设置对频散曲线有一定影响,采用大于勘测深度,小于4倍勘测深度可以得到较稳定的结果.最后,为了得到更加光滑稳定的频散曲线,提出了一种基于多道瑞利波的改进方法.用此方法对四种典型地层模型下的多道瑞利波数据进行分析,得到频散曲线光滑稳定,且比理论频散曲线和基于单道法获得频散曲线更能准确反映地层变化情况.这就为瑞利波勘探中的反演解释提供了更可靠依据.
中图分类号:
王佳文, 柴冬梅, 凡友华, 刘忠诚. 2012. 广义S变换在瑞利波频散曲线提取中的应用. 地球物理学进展, (4): 1615-1623. doi: 10.6038/j.issn.1004-2903.2012.04.039 .
WANG Jia-wen, CHAI Dong-mei, FAN You-hua, LIU Zhong-cheng. 2012. Study on extraction method of dispersion curve by generalized S-transform. Progress in Geophysics. (4): 1615-1623. doi: 10.6038/j.issn.1004-2903.2012.04.039 .
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