A New Method for Calculation of Single Seismic Phase of Cylindrically Multilayered Media Including Liquid Interlayer
A New Method for Calculation of Single Seismic Phase of Cylindrically Multilayered Media Including Liquid Interlayer作者机构：School of Physics Jilin University Changchun 130023 School of Civil Engineering Hehai University Nanjing 210098
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2007年第24卷第5期
页 面：1309-1312页
核心收录：
学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学]
基 金：＊ Supported by the National Natural Science Foundation of China under Grant Nos 40674059 and 10534040 and the Specialized Research Fund for the Doctoral Programme of Higher Education of China under Grant No 20040183045.
摘 要：A new method based on generalized reflection and transmission （R/T） coefficients method is proposed to calculate the single seismic phase （SSP） of cylindrically multilayered media including liquid interlayer. The use of normalization factors and normalized Lamé coefficients makes the algorithm stable numerically. Using the modified R/T matrices, we derive the iterative expressions of generalized R/T matrices, and by using the iterative relation we determine the SSP of each interface and the full waveforms. To show the superiority of this new approach for investigating of reflection and transmission properties of cylindrically multilayered media, we simulate the full waveforms and SSPs of cased hole model with annulus I （casing-cement interface） channelling （or, cross-flow）. The generalized reflection coefficient spectra and SSPs of interfaces obtained show the propagation mechanism of each component of full waveform clearly.
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