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Evaluation of a Finite Element Approach for Damping Determination
Author(s) -
Hentschel Olaf Peter,
Bonhage Marius,
Panningvon Scheidt Lars,
Wallaschek Jörg
Publication year - 2015
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201510091
Subject(s) - finite element method , stress (linguistics) , context (archaeology) , magnetic damping , quality (philosophy) , amplitude , structural engineering , basis (linear algebra) , damping ratio , function (biology) , materials science , mechanics , physics , mathematical analysis , statistical physics , mathematics , vibration , engineering , acoustics , geometry , geology , optics , paleontology , philosophy , linguistics , quantum mechanics , evolutionary biology , biology
In this paper, a well‐known law for material damping description (see [1]) is verified. Thereby, material damping is characterized as a function of local stress amplitudes. To identify the resulting structural damping, a calculation of local stresses is necessary. In a first step, an analytical approach is used to calculate the damping on the basis of the stress distribution. In a second step, the local stress distribution of the described structure is calculated using a finite element approach. In this context, damping is calculated using the identified discrete stress values through the structure. By varying the mesh density, the resulting damping is compared to the calculated damping using the analytical results. Finally, it can be seen that the quality of the calculated damping value depends on the quality of the calculated stress value and therefore on the mesh density. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)