中文摘要：

以加筋柱壳及典型基座结构为对象，分析了基座阻抗均匀化对加筋柱壳水下辐射噪声的影响。基于有限元法通过改变基座结构特征参数，研究加筋柱壳水下辐射噪声特性及基座结构阻抗特性，利用数值计算法分析基座结构机械阻抗对加筋柱壳水下辐射噪声的影响规律，在此基础上，进一步研究基座阻抗均匀化对加筋柱壳水下辐射噪声的影响。研究表明，相比于机械阻抗对加筋柱壳水下辐射噪声的影响，基座阻抗均匀化对其影响较小，但随着基座阻抗均匀程度的提高，加筋柱壳水下辐射噪声在减小。

英文摘要：

The influence of homogenization of foundation impedance on underwater vibration and radiation noise of a stiffened cylindrical hull is analyzed by means of FEM. By changing the size and shape parameters of the foundation, the characteristic of the underwater radiation noise of the stiffened cylindrical hull and the characteristic of the foundation impedance are studied. On this basis, the influence of homogenization of the foundation impedance on the underwater radiation noise characteristic of the stiffened cylindrical hull is discussed in detail. Research result shows that the influence of the impedance homogenization of the foundation on the underwater radiation noise of the stiffened cylindrical hull is smaller than that of the mechanical impedance. But with the increasing of the homogenization level of the impedance of the foundation, the underwater radiation noise of the reinforced hull decreases.