Journal article
Higher harmonic generation in nonlinear waveguides of arbitrary cross-section
The Journal of the Acoustical Society of America, v 127(5), pp 2790-2796
01 May 2010
PMID: 21117728
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This article concerns the generation and properties of double harmonics in nonlinear isotropic waveguides of complex cross-section. Analytical solutions of nonlinear Rayleigh-Lamb waves and rod waves have been known for some time. These solutions explain the phenomenon of cumulative double harmonic generation of guided waves. These solutions, however, are only applicable to simple geometries. This paper combines the general approach of the analytical solutions with semi-analytical finite element models to generalize the method to more complex geometries, specifically waveguides with arbitrary cross-sections. Supporting comparisons with analytical solutions are presented for simple cases. This is followed by the study of the case of a rail track. One reason for studying nonlinear guided waves in rails is the potential measurement of thermal stresses in welded rail.
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Details
- Title
- Higher harmonic generation in nonlinear waveguides of arbitrary cross-section
- Creators
- Ankit Srivastava - University of California San DiegoIvan Bartoli - University of California San DiegoSalvatore Salamone - University of California San DiegoFrancesco Lanza di Scalea - University of California San Diego
- Publication Details
- The Journal of the Acoustical Society of America, v 127(5), pp 2790-2796
- Publisher
- Acoustical Society of America
- Grant note
- FA9550-07-1-0016 / USAFOSR N00014-08-1-0973 / ONR 59A0538 / UNSPECIFIED
- Resource Type
- Journal article
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000277617300018
- Scopus ID
- 2-s2.0-77956235670
- Other Identifier
- 991020547321404721
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- Web of Science research areas
- Acoustics
- Audiology & Speech-language Pathology