Application of the finite difference time domain method to the time reversal wave in shallow water

A propagation path of sound wave in shallow water may contain some obstacles, such as sunken ship and structure. In order to analyze the waves reflected from the object in the sound field, we have to analyze the reflected pulse wave in time domain. The solution of the time dependent wave equation ca...

Full description

Saved in:
Bibliographic Details
Published inOceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600) Vol. 4; pp. 2236 - 2241 Vol.4
Main Authors Saito, H., Naoi, J., Tsuchiya, T., Kikuchi, T.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2004
Subjects
Acoustic diffraction
Acoustic propagation
Finite difference methods
Fourier transforms
Frequency domain analysis
Marine technology
Marine vehicles
Partial differential equations
Steady-state
Time domain analysis
Online AccessGet full text

Cover

More Information
Summary:A propagation path of sound wave in shallow water may contain some obstacles, such as sunken ship and structure. In order to analyze the waves reflected from the object in the sound field, we have to analyze the reflected pulse wave in time domain. The solution of the time dependent wave equation can be obtained via a Fourier transform of the frequency domain solution. However, it is difficult to obtain a solution in frequency domain for the sound field including complicated objects. We analyze the reflected and diffracted wave from an object using the FDTD method directly analyzing in time domain. Furthermore, time reversal processing to the reflected and diffracted wave is carried out, and time reversed wave is reradiated from the time reversal array (TRA). And the convergence characteristic of the wave carried out time reversal is investigated
ISBN:0780386698
9780780386693
DOI:10.1109/OCEANS.2004.1406497