Abstract The acoustic radiation efficiency of a cylindrical shell is an important parameter in estimating the sound radiation emitted by a structure. However, many of the relevant previous studies have approached acoustic radiation problem by employing numerical methods, requiring large computational resources. In this study, an analytical method is developed to calculate the acoustic radiation efficiency of a finite-length, submerged, periodically stiffened cylindrical shell excited by a radial line force. Using the Flugge shell equations and Helmholtz equation, the motions of the shell wall and the acoustic pressure field in the outer fluid can be expressed analytically. Furthermore, to investigate the effects of finite length on the acoustic radiation efficiency, a stiffened cylindrical shell of infinite length is assumed to have a finite-length vibration distribution and to be constrained by simply supported boundary conditions. Numerical simulations are performed to investigate the acoustic radiation efficiency’s dependency on the finite-length vibration and the presence of stiffeners.

中文翻译：

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有限振动载荷下浸入式周期环加强圆柱壳的声辐射效率

摘要 圆柱壳的声辐射效率是估算结构发出的声辐射的一个重要参数。然而，许多相关的先前研究已经通过采用数值方法来解决声辐射问题，需要大量的计算资源。在这项研究中，开发了一种分析方法来计算由径向线力激发的有限长度、浸没、周期性加强的圆柱壳的声辐射效率。利用 Flugge 壳方程和亥姆霍兹方程，可以解析地表达壳壁的运动和外部流体中的声压场。此外，为了研究有限长度对声辐射效率的影响，假设无限长的加筋圆柱壳具有有限长度的振动分布，并受简支边界条件的约束。执行数值模拟以研究声辐射效率对有限长度振动和加劲肋的存在的依赖性。