Acoustic predictions of the recently developed traceo ray model, which accounts for bottom shear properties, are benchmarked against tank experimental data from the EPEE-1 and EPEE-2 (Elastic Parabolic Equation Experiment) experiments. Both experiments are representative of signal propagation in a Pekeris-like shallow-water waveguide over a non-flat isotropic elastic bottom, where significant interaction of the signal with the bottom can be expected. The benchmarks show, in particular, that the ray model can be as accurate as a parabolic approximation model benchmarked in similar conditions. The results of benchmarking are important, on one side, as a preliminary experimental validation of the model and, on the other side, demonstrates the reliability of the ray approach for seismo-acoustic applications.
REFERENCES
1.
F.
Jensen
and C.
Ferla
, “Numerical solution of range-dependent benchmark problems in ocean acoustics
,” J. Acoust. Soc. Am.
87
, 1499
–1510
(1990
).2.
R.
Stephen
, “Solutions to range-dependent benchmark problems by the finite-difference method
,” J. Acoust. Soc. Am.
87
, 1527
–1534
(1990
).3.
D.
Thomson
and G.
Brooke
, “Numerical implementation of a modal solution to a range-dependent benchmark problem
,” J. Acoust. Soc. Am.
87
, 1521
–1526
(1990
).4.
E.
Westwood
, “Ray model solutions to the benchmark wedge problems
,” J. Acoust. Soc. Am.
87
, 1539
–1545
(1990
).5.
M.
Buckingham
and A.
Tolstoy
, “An analytical solution for benchmark problem 1: The ideal wedge
,” J. Acoust. Soc. Am.
87
, 1511
–1513
(1990
).6.
J.
Collis
, W.
Siegmann
, M.
Collins
, H.
Simpson
, and R.
Soukup
, “Comparison of simulations and data from a seismo-acoustic tank experiment
,” J. Acoust. Soc. Am.
122
, 1987
–1993
(2007
).7.
H.
Simpson
, J.
Collis
, R.
Soukup
, M.
Collins
, and W.
Siegmann
, “Experimental testing of the variable rotated elastic parabolic equation
,” J. Acoust. Soc. Am.
130
, 2681
–2686
(2011
).8.
D.
Outing
, W.
Siegmann
, M.
Collins
, and E.
Westwood
, “Generalization of the rotated parabolic equation to variable slopes
,” J. Acoust. Soc. Am.
6
, 3534
–3538
(2006
).9.
10.
O.
Rodríguez
, “General description of the BELLHOP ray tracing model
,” technical report, 2008
(Last viewed 06/15/2012).11.
E.
Westwood
and P.
Vidmar
, “Eigenray finding and time series simulation in a layered-bottom ocean
,” J. Acoust. Soc. Am.
81
, 912
–924
(1987
).12.
H.
Weinberg
and R.
Keenan
, “Gaussian ray bundles for modeling high-frequency propagation loss under shallow-water conditions
,” J. Acoust. Soc. Am.
100
, 1421
–1431
(1996
).13.
http://www.siplab.fct.ualg.pt (Last viewed 06/15/2012).
14.
P.
Santos
, P.
Felisberto
, O.
Rodríguez
, and S.
Jesus
, “Geoacoustic matched-field inversion using a vector sensor array
,” in Conference on Underwater Acoustic Measurements
, Nafplion
, Greece
(2009
), pp. 29
–34
.15.
P.
Santos
, O.
Rodríguez
, P.
Felisberto
, and S.
Jesus
, “Seabed geoacoustic characterization with a vector sensor array
,” J. Acoust. Soc. Am.
128
, 2652
–2663
(2010
).16.
P.
Santos
, P.
Felisberto
, O.
Rodríguez
, J.
Joao
, and S.
Jesus
, “Geometric and Seabed parameter estimation using a Vector Sensor Array—Experimental results from Makai experiment 2005
,” in OCEANS2011
, Santander
, Spain
(2011
), pp. 1
–10
.17.
M.
Popov
and I.
Peník
, “Computation of ray amplitudes in homogeneous media with curved interfaces
,” Studia Geoph. Geod.
22
, 248
–258
(1978
).18.
F.
Jensen
, W.
Kuperman
, M.
Porter
, and H.
Schmidt
, Computational Ocean Acoustics, AIP Series in Modern Acoustics and Signal Processing
(AIP
, New York
, 1994
), Chap. 3.19.
M.
Popov
, “Ray theory and Gaussian beam method for geophysicists
,” technical report EDUFBA, Universidade Federal da Bahia (2002
).20.
M.
Porter
and H.
Bucker
, “Gaussian beam tracing for computing ocean acoustic fields
,” J. Acoust. Soc. Am.
82
, 1349
–1359
(1987
).21.
P.
Papadakis
, M.
Taroudakis
, and J.
Papadakis
, “Recovery of the properties of an elastic bottom using reflection coefficient measurements
,” in Proceedings of the 2nd European Conference on Underwater Acoustics
, Copenhagen
, Denmark
(1994
), Vol. II, pp. 943
–948
.22.
M.
Porter
and Y.-C.
Liu
, “Finite-Element Ray Tracing
,” in Theoretical and Computational Acoustics
(World Scientific Publishing
, Singapore
, 1994
), Vol. 2, pp. 947
–956
.23.
H.
Schmidt
, “SAFARI, seismo-acoustic fast field algorithm for range-independent enviroments. User’s guide
,” technical report, Saclant Undersea Research Centre (SM-113), La Spezia, Italy (1987).24.
F.
Press
and M.
Ewing
, “Propagation of explosive sound in a liquid layer overlying a semi-infinite elastic solid
,” Geophysics
15
, 426
–446
(1950
).25.
P.
Felisberto
, O.
Rodríguez
, P.
Santos
, and S. Jesus, “On the usage of the particle velocity field for bottom characterization
,” in International Conference on Underwater Acoustic Measurements
, Kos
, Greece
(2011), pp. 19
–24
.26.
M.
Collins
, User’s Guide for RAM Versions 1.0 and 1.0p
(Naval Research Laboratory
, Washington, DC
, 2006
).© 2012 Acoustical Society of America.
2012
Acoustical Society of America
You do not currently have access to this content.