Open Access

ARTICLE

Acoustic Scattering from Complex Shaped Three Dimensional Structures

B. Chrasekhar¹, S. M. Rao²

1 Supercomputer Education and Research Centre, IISc, Bangalore - 560012, INDIA
2 Department of E &CE, Auburn University, Auburn, AL-36849, USA.

Computer Modeling in Engineering & Sciences 2005, 8(2), 105-118. https://doi.org/10.3970/cmes.2005.008.105

Abstract

In this work, a simple, robust, and an efficient numerical algorithm to calculate the scattered acoustic fields from complex shaped objects such as aircrafts and missiles, subjected to a plane wave incidence is presented. The work is based on the recently proposed method of moments (MoM) and the potential theory, unlike the standard Helmholtz integral equation (HIE) solution method. For the numerical solution, the scattering structure is approximated by planar triangular patches. For the MoM solution of complex bodies involving open/closed/intersecting surfaces, a unified set of basis functions to approximate the source distribution is defined. These basis functions along with suitable testing procedure generates a simple numerical algorithm applicable to complex shaped finite bodies. Finally, several numerical examples, along with comparison with other methods wherever possible, have been presented to illustrate the capabilities of the present method.

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Keywords

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