双层柱壳在流场中辐射声场压力的解析解

基金项目: 国防科技重点实验室基金资助项目(99JS2321JWO506)

Analytical Solution of Radiation Sound Pressure of Double Cylindrical Shells in Fluid Medium

1.
Faculty of Traffic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China;
2.
System Engineering Research Institute, CSSC, Beijing 100036, P. R. China

摘要: 应用Donnell壳体理论,对加强内外壳体的横向构件,利用交界面的变形协调条件,等价为作用在壳体上的反力和反力矩,把双层柱壳振动辐射声场压力的求解,归结为求解结构动力方程、流场Helmholtz方程、流体和结构交界面上连续性条件组成的声-流体-结构的耦合振动方程.通过复杂的求解方法,可直接求得双层柱壳近场声压.
- 双层柱壳 /
- 耦合振动方程 /
- 声场压力
Abstract: The Donnell theory of shell was applied to describe shell motion. The inner and outer shells were stiffened by transverse components. Using deformation harmonious conditions of the interface, the effects of stiffeners were treated as reverse forces and moments on the double cylindrical shell. In the acoustic field produced by vibration and sound radiation of the double shell, the structure dynamic equation, Helmholtz equation in the fluid field and the continuity conditions of the surface of fluid-structure compose the vibration equation coupled by the sound-fluid-structure. The extract of acoustic pressure comes down to the extract of coupling vibration equation. The near field acoustic pressure can be solved directly by complicated calculational methods.
- double cylindrical shell /
- coupling vibration equation /
- acoustic pressure

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