Accession Number:

ADA361855

Title:

Three-Dimensional Analysis of Acoustic Scattering from a Coated Cylindrical Shell.

Descriptive Note:

Final technical rept.,

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI

Personal Author(s):

• Ko, Sung H.
• Sandman, Bruce E.

Report Date:

1998-09-15

Pagination or Media Count:

58.0

Abstract:

A theoretical model was developed to evaluate the farfield pressure scattered from a coated cylindrical shell by a plane acoustic wave incident at an angle to the cylindrical axis a three-dimensional problem. The model is a two-layer-structure comprising an outer layer of microvoided elastomer coating that is perfectly bonded to a cylindrical shell. The analysis of this model is based on the theory of elasticity, acoustic wave equations, and pertinent boundary conditions. The major results presented here are calculated directivity patterns using three-dimensional analysis.

Descriptors:

• *MATHEMATICAL MODELS
• *ACOUSTIC WAVES
• *SHELLS(STRUCTURAL FORMS)
• *THREE DIMENSIONAL
• *CYLINDRICAL BODIES
• *ACOUSTIC SCATTERING
• LAYERS
• ELASTIC PROPERTIES
• ELASTOMERS
• BOUNDARIES
• COATINGS
• MATHEMATICAL ANALYSIS
• WAVE EQUATIONS

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE