lect_141 - Lecture 14 r j-1 j r r j+1 Sector j...

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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Computational Ocean Acoustics • Ray Tracing • Wavenumber Integration • Normal Modes • Parabolic Equation
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Normal Modes • Perturbation Approaches – Attenuation (5.8) – Group Velocity (5.8.1) • Modes for Range-Dependent Envir. – Coupled Modes (5.9) – One-way Coupled Modes – Adiabatic Modes
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Pekeris Waveguide Modal Phase Velocity 1 v n [See Fig 2.28b in Jensen, Kuperman, Porter and Schmidt. Computational Ocean Acoustics. New York: Springer-Verlag, 2000.]
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Modal Phase Velocity 1 v n Ideal Waveguide [See Jensen, Fig 2.22]
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Normalized Hankel Functions Forward Backward Asymptotic r j-1 j r r j+1 Sector j Forward Backward
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 r j-1 j r r j+1 Sector j
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COMPUTATIONAL OCEAN ACOUSTICS 13.853
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Unformatted text preview: Lecture 14 r j-1 j r r j+1 Sector j COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 r j-1 j r r j+1 Sector j COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 r j-1 j r r j+1 Sector j Source Reflection Radiation Condition b = N COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Reflection r j-1 j r r j+1 Sector j Source Radiation Condition b = N COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 r j-1 j r r j+1 Sector j Radiation Condition b = N Mean of pressure and velocity coupling Other: p/( c) continuous 1/2 COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Continuous Mode Coupling COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 ODE for Continuously Coupled Modes Solved e.g. by FD COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Adiabatic Approximation COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 14 Warm-Core Eddy Propagation [Examples: See Jensen Figs 5.17, 5.18, 5.19a]...
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lect_141 - Lecture 14 r j-1 j r r j+1 Sector j...

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