Experiment and modeling of vibro-acoustic response of a stiffened submerged cylindrical shell with force and acoustic excitation

Xianzhong Wang,Yingying Zuo,Yeping Xiong,Quanzhou Jiang,Di Chen

doi:10.1016/j.rinp.2018.09.017

Xianzhong Wang, Yingying Zuo + Show 3 more

Open Access

https://doi.org/10.1016/j.rinp.2018.09.017

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Abstract

Abstract Taken a submerged ring-stiffened cylindrical shell as an experimental model, the experimental studies was investigated to study the effects of force and acoustic excitation on the vibro-acoustic response of the cylindrical shell. A precise transfer matrix method (PTMM) was presented to compare the shell vibration and sound radiation of the submerged stiffened cylindrical shell with the experimental results. The result shows that results from PTMM are in good agreement with the experimental results. It shows that the PTMM is reliable and the result from PTMM is credible. The vibration acceleration response of the water case has less peak numbers and the value is less than that of the air case. The peak value of sound pressure in the force excitation case is relate to structural natural frequency. The peak value of sound pressure in the acoustic excitation case is relate to structural natural frequency and internal cavity natural frequency.

Highlights

Ring-stiffened cylindrical shells are the typical structural forms in aeronautical or naval industry
Chen et al [25,26] developed a hybrid approach combining WBM and finite element method (FEM) is presented to investigate vibration characteristics of a cylindrical shell coupled with interior structures
Due to the operation of internal machinery and equipment, radiation noise of cylindrical shells is generated by two kinds of motivation: force excitation and acoustic excitation

Summary

Introduction

Ring-stiffened cylindrical shells are the typical structural forms in aeronautical or naval industry. Caresta and Kessissoglou [11,12,13] used the wave propagation method to solve the structure response and acoustic radiation characteristics of underwater ring stiffened cylindrical shell under axial excitation. They paid more attention on the structural and acoustic of a submarine hull considering effect of propeller forces and harmonic excitation. Wang et al [15,16,17] developed a precise transfer matrix method for vibro-acoustic analysis of submerged stiffened combined shell and conical shell by solving a set of first order differential equations. Qu et al [18,19,20] presented a modified variational method for free and forced vibration analysis of ring-stiffened conical-cylindrical and conical-cylindrical-spherical shells subjected to different boundary conditions, and used the discrete element stiffener theory to consider the ring-stiffening effects

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