Accession Number:
ADA276663
Title:
Sound Scattering by Cylinders of Noncircular Cross Section
Descriptive Note:
Doctoral thesis
Corporate Author:
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
Personal Author(s):
Report Date:
1994-02-01
Pagination or Media Count:
91.0
Abstract:
This thesis investigates a new method for predicting the farfield scattered pressure of a plane wave due to an infinite cylinder of noncircular cross section. Both impenetrable and penetrable fluid boundary conditions will be treated for several types of cross sections and for a large frequency range. This new method requires the conformal mapping of both the exterior and interior of a closed surface to a semi-infinite strip. Numerically efficient algorithms will be presented for both of these cases. A new method for satisfying the boundary conditions will be developed, as well as an efficient algorithm for generating the required modal functions on the boundary. Numerical results are presented for cross sections in the shape of an ellipse, square, and three leaf clover. In all cases, the results compare extremely well with exact or high frequency asymptotic results. Acoustics, Scattering, Cylinders
Descriptors:
- *BOUNDARIES
- *ACOUSTIC SCATTERING
- *UNDERWATER ACOUSTICS
- *CONFORMAL MAPPING
- ALGORITHMS
- FREQUENCY
- SCATTERING
- HIGH FREQUENCY
- OCEAN SURFACE
- SHAPE
- COORDINATES
- PRESSURE
- ELLIPSES
- OCEAN BOTTOM
- PLANE WAVES
- OCEAN ENVIRONMENTS
- TARGET DETECTION
- MAPPING
- FLUIDS
- ACOUSTICS
- GEOMETRY
- CROSS SECTIONS
- CYLINDRICAL BODIES
- THESES
- TARGET DISCRIMINATION
- BACKSCATTERING
- FAR FIELD
- SURFACES
Subject Categories:
- Numerical Mathematics
- Acoustics