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An explicit local time stepping for modelling of wave propagation in heterogeneous bars
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SYSNO ASEP 0518697 Document Type A - Abstract R&D Document Type O - Ostatní Title An explicit local time stepping for modelling of wave propagation in heterogeneous bars Author(s) Kolman, Radek (UT-L) RID Number of authors 1 Source Title ICoNSoM2019. - Řím, Itálie : Palazzo Argiletum, Řím, 2019
S. 99Number of pages 1 s. Publication form Online - E Action International Conference on Nonlinear Solid Mechanics Event date 16.06.2019 - 19.06.2019 VEvent location Roma Country IT - Italy Event type WRD Language eng - English Country IT - Italy Keywords wave propagation ; finite element method ; spurious oscillations Subject RIV BI - Acoustics OECD category Applied mechanics R&D Projects EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA19-04956S GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support UT-L - RVO:61388998 Annotation We present an explicit local time stepping for accurate finite element modelling of elastic wave propagation in heterogeneous bars. The main trouble of classical explicit time integration
based on the central difference in time with combination with the spatial discretization by finite element method is existence of numerical stress spurious oscillations and sensitivity of results
on chosen time step size. The nominated time scheme is based on local time stepping with local time step size for each finite element and pullback interpolation of local displacements on the
global level. The scheme is explicit and of second order. In this contribution, we shown the results for wave propagation in heterogeneous bars as layered and graded bars.Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2020
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