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Intrinsically selective mass scaling with hierarchic plate formulations
Citation Link: https://doi.org/10.15480/882.13581
Publikationstyp
Journal Article
Date Issued
2024-12-01
Sprache
English
TORE-DOI
Volume
432
Article Number
117430
Citation
Computer Methods in Applied Mechanics and Engineering 432: 117430 (2024)
Publisher DOI
Scopus ID
Publisher
Elsevier
Peer Reviewed
true
The critical time step in explicit time integration methods depends on the highest natural angular frequency of the discretized problem. For shear deformable beam, plate and shell formulations, efficiency is therefore typically limited by the highest transverse shear frequencies, which are mostly of minor importance for the structural response. Direct parametrization using transverse shear variables within hierarchic structural element formulations allows a selective scaling of transverse shear frequencies in a simple manner, while bending frequencies remain practically unaffected. In particular, the novel concept of intrinsically selective mass scaling (ISMS) results in an efficient method that features high accuracy and preserves both linear and angular momentum for both consistent and lumped mass matrices. In addition, ISMS preserves the diagonal structure of lumped mass matrices. Similar to the underlying intrinsically locking-free, hierarchic concept for shear deformable structural element formulations, ISMS retains its beneficial properties for any smooth discretization scheme. In this contribution, we extend recent research on ISMS for beam formulations to the case of shear deformable plate formulations. We test our novel concept with respect to accuracy and efficiency by means of selected numerical experiments. We study both frequency spectra and the transient behavior in explicit time integration. To demonstrate the generality of ISMS, exemplarily both isogeometric discretizations based on B-splines and meshfree discretizations using local maximum-entropy approximants are investigated.
Subjects
Explicit time integration
Frequency spectra
Hierarchic plate formulations
Isogeometric analysis
Meshfree discretization
Selective mass scaling
DDC Class
624: Civil Engineering, Environmental Engineering
Publication version
publishedVersion
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1-s2.0-S0045782524006856-main.pdf
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1.46 MB
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