International Journal for Numerical Methods in Engineering · 2013 · 182 citations · 56 references
EngineeringCivil EngineeringComputational EngineeringComputational MechanicsEarthquake EngineeringMultiscale ModelingEngineering SeismologyMultiscale Finite Element MethodsMultiscale MechanicsMultiscale Structural ModelingSeismic Wave PropagationWave Propagation In StructuresComputational ElastodynamicsDiscontinuous Galerkin FormulationDynamic Soil-structure InteractionGalerkin DiscretizationMesh SizeSeismic Wave Propagation In SoilsSpectral ApproximationWave Propagation Analysis
This work introduces SPectral Elements in Elastodynamics with Discontinuous Galerkin (SPEED), an open‑source high‑performance code for simulating seismic wave propagation in visco‑elastic heterogeneous 3‑D media at local and regional scales. SPEED employs non‑conforming high‑order discontinuous Galerkin spectral methods with scalable algorithms that support non‑uniform polynomial degrees and locally varying mesh sizes, and its parallel kernel is validated against benchmarks and illustrated with engineering examples. The method proves especially effective for earthquake engineering applications such as dynamic soil‑structure and site‑city interaction modeling, where it captures multiscale wave propagation and sharp material discontinuities. © 2013 John Wiley & Sons, Ltd.
SUMMARY This work presents a new high performance open‐source numerical code, namely SPectral Elements in Elastodynamics with Discontinuous Galerkin , to approach seismic wave propagation analysis in visco‐elastic heterogeneous three‐dimensional media on both local and regional scale. Based on non‐conforming high‐order techniques, such as the discontinuous Galerkin spectral approximation, along with efficient and scalable algorithms, the code allows one to deal with a non‐uniform polynomial degree distribution as well as a locally varying mesh size. Validation benchmarks are illustrated to check the accuracy, stability, and performance features of the parallel kernel, whereas illustrative examples are discussed to highlight the engineering applications of the method. The proposed method turns out to be particularly useful for a variety of earthquake engineering problems, such as modeling of dynamic soil structure and site‐city interaction effects, where accounting for multiscale wave propagation phenomena as well as sharp discontinuities in mechanical properties of the media is crucial. Copyright © 2013 John Wiley & Sons, Ltd.
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