TY - GEN
T1 - Prediction of the radiated sound power from a fluid-loaded finite cylinder using the surface contribution method
AU - Liu, Daipei
AU - Peters, Herwig
AU - Kessissoglou, Nicole
AU - Marburg, Steffen
PY - 2014
Y1 - 2014
N2 - Based on acoustic radiation modes, the surface contribution method has been developed to predict the surface contributions to the radiated sound power from a vibrating structure. In this work, the surface contribution method is used to identify the sound field on a vibrating structure submerged in a heavy fluid. It was recently found that surface contribution method was not able to predict the surface contributions at low frequencies when the structural wavenumber is higher than the acoustic wavenumber. In this paper, the acoustic radiation efficiencies calculated for different numbers of integration points are compared and used to compute the surface contributions to the radiated sound power. The radiated sound power obtained from both the surface contribution and the active intensity methods are compared. Numerical results for a fully coupled finite element/boundary element model of a cylindrical shell with hemispherical end closures submerged in water show that the surface contribution method can also be successfully applied at low frequencies.
AB - Based on acoustic radiation modes, the surface contribution method has been developed to predict the surface contributions to the radiated sound power from a vibrating structure. In this work, the surface contribution method is used to identify the sound field on a vibrating structure submerged in a heavy fluid. It was recently found that surface contribution method was not able to predict the surface contributions at low frequencies when the structural wavenumber is higher than the acoustic wavenumber. In this paper, the acoustic radiation efficiencies calculated for different numbers of integration points are compared and used to compute the surface contributions to the radiated sound power. The radiated sound power obtained from both the surface contribution and the active intensity methods are compared. Numerical results for a fully coupled finite element/boundary element model of a cylindrical shell with hemispherical end closures submerged in water show that the surface contribution method can also be successfully applied at low frequencies.
KW - Acoustic radiation efficiencies
KW - Active intensity
KW - Supersonic acoustic intensity
KW - Surface contribution method
UR - http://www.scopus.com/inward/record.url?scp=84923582697&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84923582697
T3 - INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control
BT - INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering
A2 - Davy, John
A2 - Burgess, Marion
A2 - Don, Charles
A2 - Dowsett, Liz
A2 - McMinn, Terry
A2 - Broner, Norm
PB - Australian Acoustical Society
T2 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014
Y2 - 16 November 2014 through 19 November 2014
ER -