Accession Number:

ADA281714

Title:

Problems in Nonlinear Acoustics: Surface Acoustic Waves, Diffracting Sound Beams, and Fluid-Solid Interface Effects.

Descriptive Note:

Annual summary rept. no. 6, 1 Sep 1993-31 May 1994

Corporate Author:

TEXAS UNIV AT AUSTIN DEPT OF MECHANICALENGINEERING

Personal Author(s):

• Hamilton, Mark F.

Report Date:

1994-05-31

Pagination or Media Count:

28.0

Abstract:

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.

Descriptors:

• *ACOUSTIC WAVES
• *DIFFRACTION
• *RAYLEIGH WAVES
• MIRRORS
• PISTONS
• NONDESTRUCTIVE TESTING
• INTERFACES
• GAUSSIAN NOISE
• SOLIDS
• NONLINEAR SYSTEMS
• ANTENNAS
• FLUIDS
• NOISE
• ACOUSTIC REFLECTION
• SURFACE ACOUSTIC WAVES
• SPHERICAL WAVES

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE