A Study of the Elliptic Polarization Characteristics of Fundamental Mode Rayleigh Wave Based on Numerical Simulation
详细信息
- 责任者：Zhang Li (Department of Geology Engineering ; Faculty of Geosciences and Environmental Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; China) ; Liu Zhengping
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(5)
- 关键词：瑞雷波法 ; Rayleigh wave methods ; 数值分析 ; numerical analysis
- 页码：p.1686-1695
- 图表：illus., 4 tables, 33 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
Field practices show that the application of Rayleigh wave method based on its velocity dispersion property is restricted by site conditions.To deal with the limitation,the paper deduces the theoretical solution of the Rayleigh wave particle displacement,based upon the theory of Rayleigh wave and its velocity dispersion equations in horizontal layer media developed by former researchers.Then,taking some typical horizontal stratum models in civil engineering as examples,and combining with the method of micro-tremor HVSR(Horizontal to Vertical Spectral Ratio)at a single surveying point,we study the elliptic polarization characters of the fundamental mode Rayleigh wave by numerical simulation.The research results show that similar to the velocity dispersion property of Rayleigh wave,its elliptic polarization has also the dispersion property,and the horizontal to vertical spectral ratio of particle displacement of the elliptic polarization is related to the Poisson ratio structures of the strata,which is of significant potential for the development of a new survey method for the Poisson ratio structures of the strata using the multiple components of Rayleigh surface wave at a single site.
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