商德江,何祚镛

• 1:哈尔滨工程大学!哈尔滨150001,哈尔滨工程大学!哈尔滨150001

摘要：

利用有限元软件ＡＮＳＹＳ和边界元软件ＳＹＳＮＯＩＳＥ对一双层加肋圆柱壳的水下受激振动与声辐射作了数值计算分析研究．该双层柱壳为环向加肋，并且两端带有半球帽．利用ＡＮＳＹＳ软件数值计算了双壳的轴对称模态，及当双壳在水下受点力激励时外表面的法向位移、法向质点振速及表面声压和法向声强的频率响应。然后，将法向位移数据传递给ＳＹＳＮＯＩＳＥ软件，利用边界元技术计算了双壳的辐射声功率及辐射效率的频率响应，及其近场的声压和声能流分布和远场指向性。ＰＡＣＳ数：４３．２０， ４３．３０

关键词：

Abstract: The numerical analyses of vibration and sound radiation from a submerged elastic ring-stiffened double-shell with hemi-spherical cap on ends have been carried out by using FEM software ANSYS and BEM software SYSNOISE. The normal modes and its frequency response, surface sound intensity distribution and sound pressure and sound energy flow in near field, the radiated sound power and radiation efficiency of sound power are given when the double-shell Structure is immersed in water, excited by point force source. The directivity of sound in far field and the vibrational modes of this double-shell are also calculated.

Keywords:

基金项目:

通讯作者:

Email:

参考文献：

• 1张敬东,何祚镛.有限元+边界元-修正的模态分解法预报水下旋转薄壳的振动和声辐射.声学学报.1990;15(1):12-19
• 2 Burnett D S. A three-dimensional acoustic infiniteelement based on a prolate spheroidal multipole expansion.J. Acoust. SOC. Am., 1994; 96: 2798-2816
• 3 Astley R J et al. Three-dimensional wave-envelope elements of variable order for acosutic radiation and scatering. PartⅠ. Formulation in the frequency domain. J.Acoust. Soc. Am., 1998: 1O3: 49-63
• 4谭林森,骆东平,王殿卿.双层旋转流固耦合振动有限元分析.计算结构力学及应用.1993;10(4):389-396
• 5谭林森,骆东平.加筋双层流固耦联振动数值分析,华中理工大学学报.1992;20(5):93-99
• 6 ANSYS v5.2, Theory Manual, 8-7
• 7 SYSNOISE for 5.0, Theoretical Manual, 29-36
• 8 何祚镛,赵玉芳.声学理论基础.北京:国防工业出版社,1981
• 9 Zienkiewicz O G, Newton R E. Coupled vibration of astructure submerged in a compressible fluid. Proceedingsof the Symposium on Finite Element Techniques,University of Stuttgart, Germany(June 1969)
• 10 Craggs A. A finite element model for acoustically linedsmall rooms. J. Sound Vib., 1987; 1O8: 327-337
• 11监凯维奇 O C.有限元法.北京:科学出版社, 1985
• 12 Ciskowski R D, Brebbia O A et al.Boundary elementmethods in acoustic. Elsevier Applied Science, London,1991
• 13何祚镛.声学逆问题-声全息场变换技术及原特性判别.物理学进展,1996;16(4):600-610
• 14张敬东.水下旋转弹性壳体的振动与声辐射预报.哈尔滨工程大学博士学位论,1988
• 15姜俊奇.有限长加肋圆柱壳水下被激振动声辐射分析.哈尔滨工程大学硕士论文,1999
• 16 Junger M C, Feit D. Sound structures and their interaction. The MIT Press, Cambridge, Massachusetts, 1972