| VIBRATION AND ACOUSTIC RADIATION FROM SUBMERGED STIFFENED SPHERICAL SHELL WITH DECK-TYPE INTERNAL PLATE |
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| 作者姓名： | ChenJnnming HuangYuying |
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| 作者单位： | [1]DepartmentofMechanics,HuazhongUniversityofScienceandTechnology,Wuhan430074,China;DepartmentofEngineeringStructureandMechanics,WuhanUniversityofTechnology,Wuhan430070,China [2]DepartmentofMechanics,HuazhongUniversityofScienceandTechnology,Wuhan430074,China; |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(No.10172038). |
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| 摘 要： | Based on the motion differential equations of vibration and acoustic coupling system for thin elastic spherical shell with an elastic plate attached to its internal surface, in which Dirac-δ functions are employed to introduce the moments and forces applied by the attachment on the surface of shell, by means of expanding field quantities as Legendre series, a semi-analytic solution is derived for the vibration and acoustic radiation from a submerged stiffened spherical shell with a deck-type internal plate, which has a satisfactory computational effectiveness and precision for an arbitrary frequency range. It is easy to analyze the effect of the internal plate on the acoustic radiation field by using the formulas obtained by the method proposed. It is concluded that the internal plate can significantly change the mechanical and acoustic characteristics of shell, and give the coupling system a very rich resonance frequency spectrum. Moreover, the method can be used to study the acoustic radiation mechanism in similar structures as the one studied here.
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| 关 键 词： | 水中硬球壳 振动 声辐射 水中目标探测 运动微分方程 薄弹性球壳 半解析解 |
VIBRATION AND ACOUSTIC RADIATION FROM SUBMERGED STIFFENED SPHERICAL SHELL WITH DECK-TYPE INTERNAL PLATE |
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| ChenJnnming HuangYuying.VIBRATION AND ACOUSTIC RADIATION FROM SUBMERGED STIFFENED SPHERICAL SHELL WITH DECK-TYPE INTERNAL PLATE[J].Acta Mechanica Solida Sinica,2003,16(3):210-219. |
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| Authors: | Chen Junming |
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| Affiliation: | (1) Department of Mechanics, Huazhong University of Science and Technology, 430074 Wuhan, China |
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| Abstract: | Based on the motion differential equations of vibration and acoustic coupling system for thin elastic spherical shell with an elastic plate attached to its internal surface, in which Dirac-delta functions are employed to introduce the moments and forces applied by the attachment on the surface of shell, by means of expanding field quantities as Legendre series, a semi-analytic solution is derived for the vibration and acoustic radiation from a submerged stiffened spherical shell with a deck-type internal plate, which has a satisfactory computational effectiveness and precision for an arbitrary frequency range. It is easy to analyze the effect of the internal plate on the acoustic radiation field by using the formulas obtained by the method proposed. It is concluded that the internal plate can significantly change the mechanical and acoustic characteristics of shell, and give the coupling system a very rich resonance frequency spectrum. Moreover, the method can be used to study the acoustic radiation mechanism in similar structures as the one studied here. |
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| Keywords: | spherical shell deck-type internal plate vibration and acoustic radiation semianalytic solution acoustic radiation mechanism |
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