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．
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.
出处
《声学学报》
EI
CSCD
北大核心
2001年第3期193-201,共9页
Acta Acustica
