摘要
加肋圆柱壳体是水下航行器的主要结构形式。将肋骨对壳体的作用简化为只有法向力，本文导出了水中有限长加肋圆柱壳体的振动和声辐射的近似解析解。其中肋骨的作用表现为在无肋的耦合振动方程中增加附加阻抗，因此壳体的振动和声辐射由壳体的机械阻抗、流体的辐射声阻抗和肋骨的附加阻抗所决定。数值计算例子表明，在低频情况下，加肋对辐射声功率影响不大，但将降低表面平均振速，从而增加声辐射效率。
Stiffened cylindrical shells are major structures of submerged vessels. Approximate analytic solution is derived for the vibration and sound radiation from a stiffened finite cylindrical shell in water,.supposing the action of a stiffener on shell is only the normal force.In this solution an additional impedance caused by the stiffeners is added to the coupled vibration equation. As a result, the vibration and sound radiation of shell are dependent on the mechanical impedance of shell, the radiation sound impedance and the additional impedance. Numerical results show that stiffeners have no important influence on radiated sound power, while decrease surface average velocity and increase radiation efficient.
出处
《声学学报》
EI
CSCD
北大核心
2001年第1期1-5,共5页
Acta Acustica
基金
国家自然科学基金资助项目
