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Numerical modelling of acoustic scattering by smooth inclusions in a layered fluid-solid medium

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Abstract
A boundary integral equation (BIE) method as descnbed for computing the scattering of a monofrequent acoustic field by a smooth, rigid 30 object in a layered range-independent fluid-solid medium. The BIE is discretized using B-splines (BSP), point collocation and high-order numerical zntegmtzon. The drscretzzed equations are solved by an iterative method, enhanced by pre-conditioning with the LU factors of a related linear system for spline interpolation on the scatterer surface Numerical examples are given at frequencies of a few kHz, representative e.g. for a parametric transducer. The BSP method as shown to provide order-of-magnitude gains in computation times compared to a standard BEM technique with quadratic elements as frequency increases and/or accuracy requirements are tightened.

URI
http://hdl.handle.net/20.500.12489/433

Report Number
CP-45

Source
In: High Frequency Seafloor Acoustics (SACLANTCEN Conference Proceedings CP-45), 1997, pp. 283-290

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Date
1997

Author(s)
Karasalo, Ilkka
; 
Mattsson, Johan

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CP-45_Karasalo_NumericalModellingAcousticScattering.pdf (2.791Mb)

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