Accession Number : AD1024331


Title :   Development and Application of a Three-Dimensional Seismo-Acoustic Coupled-Mode Model


Descriptive Note : Technical Report,01 Jan 2015,31 Dec 2015


Corporate Author : University of Texas at Austin Austin United States


Personal Author(s) : Ballard,Megan S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1024331.pdf


Report Date : 30 Sep 2015


Pagination or Media Count : 8


Abstract : The overall goal of this research is the development of an accurate and reliable propagation model applicable to environments with elastic seabeds which exhibit strong range dependence in all three spatial dimensions. The objective of work in this report is to gain an understanding of the physics of propagation in continental shelf areas, specifically horizontal refraction and mode coupling induced by 3D inhomogeneities in the waveguide. The main accomplishments of 2015 include: (1) 3D propagation modeling out-of-plane arrivals from a scale model experiment, (2) development of a robust mode finding algorithm for environments with elastic bottoms, (3) and propagation modeling of interface waves with comparison to measured data. A robust normal-mode code for calculating the eigenvalues and eigenfunctions in environments with elastic bottoms is a necessary step towards the development of a 3D seismo-acoustic coupled-mode model.


Descriptors :   algorithms , scale models , acoustic propagation , seabed , experimental design , eigenvalues , littoral zones , continental shelves


Subject Categories : Physical and Dynamic Oceanography
      Acoustics
      Operations Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE