A study of dispersion curves of Love waves in viscoelastic media and their application
Bao-Wei ZHANG1,2, Jin DONG3, Hua WU4
1. Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China 2. National Center for Geological Exploration Technology,Langfang 065000,China 3. The Third Railway Survey and Design Institute Group Corporation,Tianjin 300251,China 4. School of Science,Chang'an University,Xi'an 710064, China
At present,the geological situation of seismic exploration is becoming more and more complicated.With the continuous development of seismic exploration,especially for viscoelastic media,the technical requirements for surface wave exploration are getting higher and higher.Love wave refers to the horizontal polarization shear wave in the surface layer after repeated reflections at the boundary of the surface layer.Love wave detection is one of the shallow surface detection method.It is very convenient and has high detection precision.Therefore,the study of Love wave has important theoretical and practical significance.In this paper,the Love wave single shot record is simulated by high order finite difference method in the case of horizontal layered complex geological.The comparison of the dispersion curves with the theoretical dispersion curves proves that the method proposed in this paper is correct.The influence of the viscoelastic medium on the Love wave dispersion curve is also discussed.Then,the least squares inversion is used to verify this conclusion.This paper provides a more complete theoretical basis for the high-precision surface wave inversion method.Finally,the field data inversion results show that the proposed method is effective and practicable.
张保卫, 董晋, 吴华. 粘弹介质勒夫波频散曲线研究及应用[J]. 物探与化探, 2020, 44(3): 599-606.
Bao-Wei ZHANG, Jin DONG, Hua WU. A study of dispersion curves of Love waves in viscoelastic media and their application. Geophysical and Geochemical Exploration, 2020, 44(3): 599-606.
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