Review of numerical models in underwater acoustics including recently developed fast-field program
Two papers given by SACLANTCEN personnel at the NATO Advanced Research Workshop on Hybrid Formulation of Wave Propagation and Scattering at Castel Gandolfo, Rome, Italy on 30 August to 3 September 1983 are published as a review of SACLANTCEN's recent programme in underwater-acoustic modelling. The first briefly reviews the physics of sound propagation in the ocean. In it the mathematical foundations of the most widely used acoustic models (ray, mode, fast field, parabolic equation) are presented and the areas of applicability of the various models are indicated. A few numerical examples are included to show the consistency among the different computer models in overlapping regimes of validity. A series of computational examples is given to demonstrate the applicability of these models to a wide range of general wave-propagation problems. The second paper presents a new numerical model, of the fast field type, where the depth-separated wave equation is solved by a numerical technique very similar to that used in finite-element programs. The speed improvement over existing models of the same type is considerable, especially in cases with many sources and receivers. The model has been used for studying both seismic pulse propagation in shallow water and reflection of pulsed ultrasonic beams from a fluid/solid interface.
SourceIn: SACLANTCEN papers presented at the NATO Advanced Research Workshop on Hybrid Formulation of Wave Propagation and Scattering, Rome, 30 August - 3 September 1983
Jensen, Finn B.;
Showing items related by title, author, creator and subject.
Ferla, Carlo M.; Jensen, Finn B. (NATO. SACLANTCEN, 1999/08)A set of AESS propagation-loss predictions has been generated for typical operational scenarios in both deep and shallow water, for two sonar frequencies (500 and 3500 Hz) and for several source-receiver combinations. ...
Dreini, Giancarlo; Isoppo, Cinzia; Jensen, Finn B. (NATO. SACLANTCEN, 1995/12)Six acoustic models available for use on PC's are tested on a series of typical propagation situations from the North Atlantic and the Mediterranean. The model set includes both early US Navy models (ASTRAL, FACT, RAYMODE) ...
Selected papers on ocean-seismo acoustics, low-frequency underwater acoustics based on the SACLANTCEN contributions to a symposium held by SACLANTCEN on 10-14 June 1985 Akal, Tuncay; Berkson, Jonathan M. (NATO. SACLANTCEN, 1986/06)