Original title: Solving the moving mass problem on large finite element models with modal analysis – estimation of the discrete movement error
Authors: Bayer, Jan
Document type: Papers
Conference/Event: Computational Mechanics 2021 /36./, Srní (CZ), 20211108
Year: 2021
Language: eng
Abstract: Solving transient dynamic problems on large finite element (FE) models using a direct integration requires a high sampling rate and therefore also considerable computing times because of the large system matrices. Movement of a mass on a FE model has to follow the discrete pattern of the FEs, and is therefore of a discrete character. This introduces an unknown\nerror into the analytical results. Applying modal analysis (MA) reduces the number of equations used in the subsequent numerical integration by orders of magnitude. Resampling of the mode shapes to the required sampling rate makes it possible to solve the moving mass problem much more quickly and quasi-continuously. The performed comparative analytical study using ANSYS and MATLAB showed that using a discrete movement on the FE mesh when solving a moving mass problem can cause a considerable error.
Keywords: ANSYS & MATLAB; discret-movement error; FE analysis; modal analysis; moving mass
Project no.: GC21-32122J (CEP)
Funding provider: GA ČR
Host item entry: Computational mechanics 2021. Proceedings of computational mechanics 2021, ISBN 978-80-261-1059-0
Note: Související webová stránka: https://www.kme.zcu.cz/compmech/info_sborniky.php

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0323814

Permalink: http://www.nusl.cz/ntk/nusl-508211


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