Nonlinear mode coupling of surface acoustic waves on an isotropic solid

Kalayanasundaram, N (1981) Nonlinear mode coupling of surface acoustic waves on an isotropic solid. In: International Journal of Engineering Science, 19 (3). pp. 435-441.

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Abstract

The nonlinear mode coupling between two co-directional quasi-harmonic Rayleigh surface waves on an isotropic solid is analysed using the method of multiple scales. This procedure yields a system of six semi-linear hyperbolic partial differential equations with the same principal part governing the slow variations in the (complex) amplitudes of the two fundamental, the two second harmonic and the two combination frequency waves at the second stage of the perturbation expansion. A numerical solution of these equations for excitation by monochromatic signals at two arbitrary frequencies, indicates that there is a continuous transfer of energy back and forth among the fundamental, second harmonic and combination frequency waves due to mode coupling. The mode coupling tends to be more pronounced as the frequencies of the interacting waves approach each other.

Item Type:	Journal Article
Publication:	International Journal of Engineering Science
Publisher:	Elsevier Science Ltd.
Additional Information:	Copyright of this article belongs to Elsevier Science Ltd.
Department/Centre:	Division of Physical & Mathematical Sciences > Mathematics
Date Deposited:	02 Jan 2010 06:56
Last Modified:	19 Sep 2010 05:47
URI:	http://eprints.iisc.ac.in/id/eprint/23893

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