On the symmetry of the impedance matrix for acoustic radiation modes and sound power evaluation

H. Peters, S. Marburg, N. Kessissoglou

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

1 Zitat (Scopus)

Abstract

By identifying the efficiently radiating acoustic radiation modes of a fluid loaded vibrating structure, the storage requirements of the acoustic impedance matrix for calculation of the sound power using the boundary element method can be greatly reduced. In order to compute the acoustic radiation modes, the impedance matrix needs to be symmetric. However, when using the boundary element method, it is often found that the impedance matrix is not symmetric. This paper describes the origin of the asymmetry of the impedance matrix and presents a simple way to generate symmetry. The introduction of additional errors when symmetrising the impedance matrix must be avoided. An example is used to demonstrate the behaviour of the asymmetry and the effect of symmetrization of the impedance matrix on the sound power. The application of the technique presented in this work to compute the radiated sound power of a submerged marine vessel is discussed.

OriginalspracheEnglisch
TitelAustralian Acoustical SocietyConference 2011, Acoustics 2011
UntertitelBreaking New Ground
Seiten345-350
Seitenumfang6
PublikationsstatusVeröffentlicht - 2011
Extern publiziertJa
VeranstaltungAustralian Acoustical SocietyConference 2011: Breaking New Ground, Acoustics 2011 - Gold Coast, QLD, Australien
Dauer: 2 Nov. 20114 Nov. 2011

Publikationsreihe

NameAustralian Acoustical SocietyConference 2011, Acoustics 2011: Breaking New Ground

Konferenz

KonferenzAustralian Acoustical SocietyConference 2011: Breaking New Ground, Acoustics 2011
Land/GebietAustralien
OrtGold Coast, QLD
Zeitraum2/11/114/11/11

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