Search results for "Time harmonic"

showing 2 items of 2 documents

Hierarchical fast BEM for anisotropic time-harmonic 3-D elastodynamics

2012

The paper presents a fast boundary element method for anisotropic time-harmonic 3-D elastodynamic problems. The approach uses the hierarchical matrices format and the ACA algorithm for the collocation matrix setup and a preconditioned GMRES solver for the solution. The development of this approach for the anisotropic case presents peculiar aspects which deserve investigation and are studied in the paper leading to the employed computational strategy and its effective tuning. Numerical experiments are presented to assess the method accuracy, performances and numerical complexity. The method ensures adequate accuracy allowing remarkable reductions in computation time and memory storage.

Fast BEMMathematical optimizationCollocationTime harmonicMechanical EngineeringComputationSolverLarge scale computationsGeneralized minimal residual methodComputer Science ApplicationsMatrix (mathematics)Modeling and SimulationGeneral Materials ScienceAnisotropyAnisotropic elastodynamicAlgorithmBoundary element methodCivil and Structural EngineeringMathematics
researchProduct

Efficient Iterative Solution of Time-harmonic Scattering by Objects in Layered Fluid

2008

We consider the computation of time-harmonic acoustic scattering by sound-soft or elastic objects in layered media. An example of such problem is the scattering by a mine buried in sediment. The computational domain can be tens or hundreds of meters long while the target requires modeling of details smaller than one centimeter. A discretized problem can have several billion degrees of freedom.

PhysicsDiscretizationTime harmonicScatteringComputationAcousticsDegrees of freedom (statistics)Computer Science::DatabasesDomain (software engineering)
researchProduct