Computation of Acoustic Normal Modes in the Ocean Using Asymptotic Expansion Methods
Abstract
In this thesis, the use of the Wentzel-Kramers-Brillouin (WKB) Theory to obtain the solution to the Helmholtz Equation governing the acoustic normal modes is examined. Specifically, uniformly valid WKB solutions for four classes of acoustic normal modes in the ocean are derived and the accuracy of the WKB approximation is tested against some exact solutions. It is found that this inherently high frequency technique has an appreciable accuracy even at a frequency of 1 Hz. A product of this thesis is a computer program that solves for the WKB modes for an arbitrary sound speed profile.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1991
- Accession Number
- ADA246556
Entities
People
- Fernando M. Pimentel
Organizations
- Naval Postgraduate School