An efficient multi-layer boundary element method for direct computation of sound propagation in shallow water environments

The objective of this thesis is to develop and apply efficient three-dimensional (3D) direct simulation capabilities for underwater sound field predictions in shallow water environments. Despite the large number of theoretical and experimental studies, direct numerical simulation of the shallow water acoustic field is still challenging due to environmental complexities and large computation cost involved. In this thesis, we develop a highly efficient O(NlogN) multi-layer boundary-element method, PFFT-BEM, for direct numerical simulation of acoustic propagation and scattering in shallow water environment. This method utilizes a Pre-corrected Fast Fourier Transform (PFFT) approach to accelerate the boundary-element method and reduce the computational efforts from O(N²~³) to O(NlogN) where N is the total number of boundary unknowns.

Name thesis:degree_name

Doctoral

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Mechanical Engineering

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2019

Author dc:creator

• Li, Chengxi,Ph. D.Massachusetts Institute of Technology.

Advisor dc:contributor.advisor

• Yuming Liu.

• Mechanical Engineering.

Statement dc:rights

• MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/124032

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/124032