Wave radiation in soils and fluids caused by structural vibrations

What is it about?

This paper discusses a semi-analytical solution approach which can be used to solve dynamic problems in which a structure vibrates in an elastic or acoustic medium. The solution is based on the mode superposition method. Both the structure and the layered medium are represented by a set of orthogonal modes the amplitudes of which are determined by the forced equations of motion. We study the proper truncation of the modes by using different criteria of convergence and we establish the most appropriate ones to be used in different cases. The method proposed can find its way in different application fields related to acoustics or elastic wave propagation. It is fast and computationally inexpensive and can be used effectively to examine wave radiation caused by structural vibrations in layered unbounded media.

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Why is it important?

We show an alternative way of efficient computation of complex problems which deal with interaction of structures with fluids and/or soils. We discuss the proper truncation of the modes which is the only approximation upon which the method is based.