Finite element modeling of the signal propagation in a thin tube and comparison with experimental data

0491020 - ÚT 2019 RIV CZ eng C - Conference Paper (international conference)
Kruisová, Alena - Kolman, Radek - Trnka, Jan - Mračko, Michal
Finite element modeling of the signal propagation in a thin tube and comparison with experimental data.
Engineering mechanics 2018. Book of full texts. Prague: Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018 - (Fischer, C.; Náprstek, J.), s. 441-444. ISBN 978-80-86246-88-8. ISSN 1805-8248.
[Engineering mechanics 2018 /24./. Svratka (CZ), 14.05.2018-17.05.2018]
R&D Projects: GA MŠMT(CZ) EF15_003/0000493; GA ČR(CZ) GA17-22615S
Institutional support: RVO:61388998
Keywords : wave propagation * finite element method * dispersion errors
OECD category: Applied mechanics

In finite element modeling of wave propagation problems, both the spatial and temporal discretization lead to dispersion errors. It means that the phase velocity of propagated wave is related to its frequency. In framework of temporal-spatial dispersion analysis, the time step size for implicit time integration method based on the Newmark method is proposed for linear and quadratic serendipity plane finite elements. In this paper, we verify the theoretical dispersion analysis by elastic wave propagation in thin tube, where experimental results are known. Such time step size was used in finite element modeling of the stress wave propagating in this thin steel tube, the results of simulations were compared with experimental results.
Permanent Link: http://hdl.handle.net/11104/0290054