| 柱状多孔媒质结构中声导波 |
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| 引用本文： | 杜光升,王耀俊,乔文孝. 柱状多孔媒质结构中声导波[J]. 中国石油大学学报(自然科学版), 1999, 23(3) |
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| 作者姓名： | 杜光升 王耀俊 乔文孝 |
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| 作者单位： | 1. 南京大学近代国家声学重点实验室,南京210093
2. 石油大学石油资源科学系 |
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| 摘 要： | 根据Ｂｉｏｔ多孔媒质声学理论及多孔媒质界面边界条件，导出了腔内为流体的柱状多孔媒质结构中任意周向波数声导波的广义色散方程。数值计算了其中轴对称和非轴对称声导波的色散特性，考察了流体多孔媒质界面特性及多孔媒质中慢纵波对声导波色散特性的影响。结果表明，利用Ｂｉｏｔ多孔媒质声传播模型和多孔媒质界面边界条件，可以求得柱状多孔媒质结构中任意周向波数声导波的色散特性
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| 关 键 词： | 声导波；多孔媒质；慢纵波；边界条件 |
GUIDED WAVES IN CYLINDRICAL POROUS STRUCTURES |
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| Du Guangsheng,Wang Yaojun,Qiao Wenxiao. GUIDED WAVES IN CYLINDRICAL POROUS STRUCTURES[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 1999, 23(3) |
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| Authors: | Du Guangsheng Wang Yaojun Qiao Wenxiao |
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| Abstract: | On the basis of the Biot theory about acoustic waves in a porous medium and boundary conditions of the porous medium interface, the generalized frequency equations for guided waves with arbitrarily circumferential wavenumber in cylindrical porous structures with a fluid|filled inner bore are derived. Numerical computations are made for dispersion characteristics of axisymetric and flexible guided waves in the cylindrical porous structures. The influences of slow longitudinal wave in the porous medium and boundary conditions for the fluid|porous medium interface on guided waves are considered. The Biot theory of acoustic wave in a porous medium and boundary conditions of the porous medium interface are favorable to obtain the dispersion characteristics of guided waves with arbitrarily circumferential wavenumber in cylindrical porous structrues.= |
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| Keywords: | guided wave porous medium slow longitudinal wave boundary conditions |
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