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S17 O Método dos Elementos de Contorno em Engenharia |
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Titulo:
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NUMERICAL MODELLING OF THE PROPAGATION OF UNDERWATER ACOUSTIC WAVES
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Resumo :
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ABSTRACT . THIS PAPER DEALS WITH THE NUMERICAL SIMULATION OF ACOUSTIC WAVE PROPAGATION IN SHALLOW WATER BY THE BOUNDARY ELEMENT METHOD. IT IS ASSUMED THAT THE SOURCE OF ACOUSTIC DISTURBANCE IS TIME-HARMONIC, THE VELOCITY OF SOUND IS CONSTANT AND THE MEDIUM IN THE ABSENCE OF PERTURBATIONS IS QUIESCENT.
FOR REGIONS OF CONSTANT DEPTH, THE BOUNDARY CONDITION ON THE FREE SURFACE AND BOTTOM BOUNDARIES IS INCORPORATED INTO THE GREEN S FUNCTION, OBTAINING FUNDAMENTAL SOLUTIONS IN THE FORM OF INFINITE SERIES. THEREFORE, ONLY IRREGULAR BOTTOM BOUNDARIES NEED TO BE DISCRETIZED. A SIMPLE NUMERICAL TEST IS INCLUDED TO VALIDATE THE FORMULATION.
KEY WORDS: ACOUSTIC, BOUNDARY ELEMENTS, SHALLOW WATER
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Autores :
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Santiago, Jose A.F.
Wrobel, Luiz C.
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Trabalho Completo :
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