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Excitation of Love waves in a thin film layer by a line source.The excitation of a Love surface wave guided by a thin film layer deposited on a semiinfinite substrate is studied in this paper. Both the thin film and the substrate are considered to be elastically isotropic. Amplitudes of the surface wave in the thin film region and the substrate are found in terms of the strength of a line source vibrating in a direction transverse to the propagating wave. In addition to the surface wave, the bulk shear wave excited by the source is also studied. Analytical expressions for the bulk wave amplitude as a function of the direction of propagation, the acoustic powers transported by the surface and bulk waves, and the efficiency of surface wave excitation are obtained. A numerical example is given to show how the bulk wave radiation pattern depends upon the source frequency, the film thickness and other important parameters of the problem. The efficiency of surface wave excitation is also calculated for various parameter values.
Document ID
19720036017
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Tuan, H.-S.
Ponamgi, S. R.
(New York, State University Stony Brook, N.Y., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: IEEE Transactions on Sonics and Ultrasonics
Volume: SU-19
Subject Category
Structural Mechanics
Accession Number
72A19683
Funding Number(s)
CONTRACT_GRANT: NGL-33-015-066
Distribution Limits
Public
Copyright
Other

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