Finite-element modeling in ocean acoustics: Where are we heading?

This paper summarizes 10 years of NURC experience with the application of a state-of-the-art FE code [Zampolli et al., JASA 122, 1472-85 (2007)] to propagation and scattering problems in ocean acoustics. We show benchmark results for low-frequency propagation in a range-dependent waveguide with an elastic bottom, and object scattering results for spheres and cylinders placed near the seafloor. Despite the computational burden associated with the FE method, its generality in treating propagation in layered fluid-elastic media of complex geometry without theoretical approximations makes it very attractive for acoustic benchmarking. And, as experience shows, what is computationally impractical today, will be easily done on a desktop computer 10 years from now. © 2010 American Institute of Physics