Transport Theory for Propagation and Reverberation
Technical Report,16 Mar 2016,31 Aug 2019
University of Washington Applied Physics Laboratory Seattle United States
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Propagation or reverberation modeling is important for many naval applications, and this project is dedicated to improving the accuracy of such modeling under realistic conditions. Propagation and reverberation modeling are typically accomplished using ray tracing, normal mode, or energy flux methods, with PE a common option for propagation. However, these methods usually rely on approximating the effects of forward scattering from roughness at the sea surface or sea floor by using a boundary reflection loss, or by simply ignoring these effects. In order to more accurately treat the full complexity of the environment, approximate wave method such as rough surface PE or full wave methods such as the Boundary Element Method BEM could be employed, and a Monte Carlo approach can in principle be used with realizations of rough boundaries. The average field or average intensity, as well as higher statistics of the field, can then be obtained through averaging results over an ensemble of realizations. The computational burden, however, makes such approaches only suitable for obtaining benchmark solutions for comparison with other methods.