Improving the computational efficiency of the enhanced AMLS method

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The objective of this study is to improve the computational efficiency of the enhanced automated multilevel substructuring (EAMLS) method (Kim et al., 2015) for dealing with large finite element models in structural dynamics. In the EAMLS method, the compensation procedure of the residual mode effect is a bottleneck resulting in a large computational cost. The original EAMLS method indeed cannot be used for finite element models with more than one million degrees of freedom in personal computers. An improvement in the computational efficiency is achieved by an interface subspace reduction and a new compensation procedure derived by residual flexibility matrices for only bottom-level substructures. Through this approach with submatrix level computations, the computation time and memory requirements are significantly reduced. Several numerical examples are presented to show the effectiveness of the proposed method.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2020-02
Language
English
Article Type
Article
Citation

COMPUTERS & STRUCTURES, v.228

ISSN
0045-7949
DOI
10.1016/j.compstruc.2019.106158
URI
http://hdl.handle.net/10203/272404
Appears in Collection
ME-Journal Papers(저널논문)
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