Journal ArticleDOI
A boundary element formulation for radiation of acoustic waves from axisymmetric bodies with arbitrary boundary conditions
TLDR
In this paper, a computational technique using the boundary element method for the prediction of sound radiated by axisymmetric bodies with arbitrary boundary conditions is presented, where the arbitrary boundary condition is expanded in a Fourier series with respect to the angle of revolution.Abstract:
This paper presents a computational technique using the boundary element method for the prediction of sound radiated by axisymmetric bodies with arbitrary boundary conditions. By taking advantage of the axisymmetric property of the body, the three‐dimensional integral formulation is reduced to a one‐dimensional integral along the generator of the body. The arbitrary boundary condition is expanded in a Fourier series with respect to the angle of revolution. The integral equation is solved using a superposition principle involving each term of the series. A numerical procedure is implemented using a curvilinear isoparametric element representation. Examples are given involving an oscillating sphere and a half vibrating sphere. The results are compared with the analytical solutions in which good agreement has been obtained.read more
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Journal ArticleDOI
Developments in structural-acoustic optimization for passive noise control
TL;DR: In this article, a review of structural and acoustic analysis techniques using numerical methods like the finite-and/or the boundary-element method is presented, followed by a survey of techniques for structural-acoustic coupling.
Journal ArticleDOI
Modeling of three-dimensional linear pressure fields in sonochemical reactors with homogeneous and inhomogeneous density distributions of cavitation bubbles
Sascha Dähnke,Frerich J. Keil +1 more
TL;DR: In this paper, a new model is presented for the numerical calculation of pressure fields in liquids with an inhomogeneous distribution of cavitation bubbles, where the first term of the integral equation embodies a simple superposition of the pressure fields of several point sources, which serves to simulate a harmonic vibrating surface.
Journal ArticleDOI
Vibro-acoustic analysis of coupled spherical–cylindrical–spherical shells stiffened by ring and stringer reinforcements
TL;DR: In this article, a semi-analytical method was developed to predict the vibration and acoustic responses of submerged coupled spherical-cylindrical-spherical shells stiffened by circumferential rings and longitudinal stringers.
Journal ArticleDOI
A high-order Nyström discretization scheme for boundary integral equations defined on rotationally symmetric surfaces
TL;DR: A scheme for rapidly and accurately computing solutions to boundary integral equations (BIEs) on rotationally symmetric surfaces in R^3 using the Fourier transform to reduce the original BIE defined on a surface to a sequence of BIEsdefined on a generating curve for the surface.
Journal ArticleDOI
An energy-based formulation for vibro-acoustic analysis of submerged submarine hull structures
TL;DR: In this article, an energy-based formulation is developed to investigate the vibro-acoustic behaviors of the submarine hull immersed in heavy fluid, which is considered as the theoretical model of the hull structure, discretized into a number of spectral elements according to the structure type.