In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 91, No. 4_Supplement ( 1992-04-01), p. 2389-2389
Kurzfassung:
In Spring, 1981, the first Parabolic Equation (PE) Workshop was held [Davis, White, and Cavanagh, NORDA Technical Note 143 (1982)]. The purpose of that workshop was to provide a forum for theoretical and applied PE developers and to compare computer results for a set of ocean acoustic problems. Underwater acoustic modelers have benefited from that set of test cases and documented PE deficiencies for nearly a decade. The second PE workshop was recently held (in Spring, 1991) to document the impressive advances that have taken place in the development of PE models over that decade. PE developers from the ocean acoustics community were invited to provide computer solutions for a new set of ocean acoustic problems. The set of problems was designed to test the ability of PE models to handle (a) wide-angle propagation (nearly ±90° with respect to the axis of propagation), (b) shear waves and shear attentuations, (c) backscatter, (d) conservation of energy, and (e) complicated range-dependent environments. In addition, predictions from the PE models were compared with measured acoustic data taken in a region where the ocean environments (water column, sediment, ocean bottom, and subbottom) were well-known. Results from this PE Workshop II indicate that several significant advances have occurred in PE model development to the extent that some current PE models can include very wide-angle propagation, shear waves, and backscatter, while conserving energy. Additionally, an unexpected problem experienced by some wide-angle split-step PE models was also presented at the PE Workshop II. These and other results from the PE Workshop II will be presented and discussed. [Work supported by ONR AEAS and ONR Acoustic Reverberation SRP.]
Materialart:
Online-Ressource
ISSN:
0001-4966
,
1520-8524
Sprache:
Englisch
Verlag:
Acoustical Society of America (ASA)
Publikationsdatum:
1992
ZDB Id:
1461063-2
