Problems in Nonlinear Acoustics: Surface Acoustic Waves, Diffracting Sound Beams, and Fluid-Solid Interface Effects.
Annual summary rept. no. 6, 1 Sep 1993-31 May 1994
TEXAS UNIV AT AUSTIN DEPT OF MECHANICALENGINEERING
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Three subject areas, with emphasis on nonlinear acoustics, are discussed in this annual summary report 1 Surface Acoustic Waves evolution equations, generalized model equations for complex space-time dependencies, and nonlinearity coefficients for Rayleigh waves, and model equation for Stoneley waves 2 Diffracting Sound Beams modeling of noise and relaxation, measurements of focused beams, and transient solution for radiation from a parabolic antenna and 3 Fluid-Solid Interface Effects comparisons of 2-D and 3-D reflection for piston and Gaussian sources.