| 包含多孔媒质的柱状复合结构中轴对称声导波 |
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| 引用本文： | 乔文孝,杜光升,王耀俊.包含多孔媒质的柱状复合结构中轴对称声导波[J].南京大学学报(自然科学版),1999,35(1):103-109. |
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| 作者姓名： | 乔文孝 杜光升 王耀俊 |
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| 作者单位： | 石油大学（华东）石油资源系，南京大学近代声学国家重点实验室 |
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| 基金项目： | 南京大学近代声学国家重点实验室开放课题 |
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| 摘 要： | 利用Ｂｉｏｔ多孔媒质声学理论及多孔媒质界面边界条件，导出了包含多孔媒质的柱状复合结构中轴对称声导波的广义色散方程，考察了流体和多孔媒质界面状况及多孔媒质中慢纵波对轴对称声导波色散特性的影响．数值计算了包含多孔媒质的柱状复合结构中低阶轴对称声导波模式相速度与多孔媒质层的孔隙度和厚度之间的关系
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| 关 键 词： | 多孔媒质，复合结构，声导波 |
AXISYMMETRIC GUIDED WAVES IN CYLINDRICAL COMPOSITE STRUCTURES WITH A POROUS INNER WALL |
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| Qiao Wenxiao,Du Guangsheng,Wang Yaojun.AXISYMMETRIC GUIDED WAVES IN CYLINDRICAL COMPOSITE STRUCTURES WITH A POROUS INNER WALL[J].Journal of Nanjing University: Nat Sci Ed,1999,35(1):103-109. |
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| Authors: | Qiao Wenxiao Du Guangsheng Wang Yaojun |
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| Affiliation: | Qiao Wenxiao 1) Du Guangsheng 2) Wang Yaojun |
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| Abstract: | Using the Biot theory about acoustic waves in a porous medium and boundary conditions of the porous medium interface, we derive the generalized frequency equation for axisymmetric guided waves in cylindrical composite structures with a porous inner wall. The influences of slow longitudinal wave in the porous medium and boundary conditions at fluid-porous medium interface on axisymmetric guided waves are considered. Numerical computations are made for the dependence of phase velocities of the lower order axisymmetric guided waves in the cylindrical composite structure on the thickness and porosity of the inner porous wall. |
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| Keywords: | Porous medium Composite structure Guided wave |
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