000013538 001__ 13538
000013538 005__ 20161114165845.0
000013538 04107 $$aeng
000013538 046__ $$k2011-05-25
000013538 100__ $$aPelties, Ch.
000013538 24500 $$aDynamic Rupture Modelling on Unstructured Meshes Using a Discontinuous Galerkin Method

000013538 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013538 260__ $$bNational Technical University of Athens, 2011
000013538 506__ $$arestricted
000013538 520__ $$2eng$$aWe will present recent developments concerning the extensions of the ADERDG method to solve three dimensional dynamic rupture problems on unstructured tetrahedral meshes. A remarkable feature of this method is the combination of the DG scheme and a time integration method using Arbitrarily high-order DERivatives (ADER) to provide high accuracy in space and time with the discretization on unstructured meshes. In the resulting discrete velocity-stress formulation of the elastic wave equations variables are naturally discontinuous at the interfaces between elements. The so-called Riemann problem can then be solved to obtain well-defined values of the variables at the discontinuity itself. This is in particular valid for the fault at which a given friction law has to be evaluated. Hence, the fault’s geometry is honored by the computational mesh. This way, complex fault planes can be modeled adequately with small elements while fast mesh coarsening is possible with increasing distance from the fault. A further advantage of the scheme is that it avoids spurious high-frequency contributions in the slip rate spectra and therefore does not require artificial Kelvin-Voigt damping or filtering of synthetic seismograms.

000013538 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013538 653__ $$aDynamic Rupture, Source Physics, Earthquake Dynamics, Seismic Wave Propagation, Computational Seismology.

000013538 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013538 720__ $$aPelties, Ch.$$iKaser, M.
000013538 8560_ $$ffischerc@itam.cas.cz
000013538 8564_ $$s326300$$uhttps://invenio.itam.cas.cz/record/13538/files/255.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 32 Waves and Computation.
000013538 962__ $$r13401
000013538 980__ $$aPAPER