Stability analysis and evaluation of staggered coupled analysis methods for electromagnetic and structural coupled finite element analysis

•A stability evaluation method is proposed for magnetic damping vibration analysis.•Numerical stability is examined by stable region for coupled analysis methods.•Computing time required to obtain stable and converged solutions is compared. The numerical stability of electromagnetic and structural c...

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Bibliographic Details
Published in:Computers & structures Vol. 178; pp. 129 - 142
Main Authors: Niho, Tomoya, Horie, Tomoyoshi, Uefuji, Junpei, Ishihara, Daisuke
Format: Journal Article
Language:English
Published: New York Elsevier Ltd 01.01.2017
Elsevier BV
Subjects:
Algorithms
Computing time
Coupled algorithm
Coupled finite element analysis
Eddy currents
Electromagnetic and structural coupled problem
Electromagnetics
Finite element analysis
Finite element method
Numerical analysis
Numerical instability
Numerical stability
Stability analysis
Structural analysis
Structural stability
Studies
Time integration
Time integration method
Time integration method
Electromagnetic and structural coupled problem
Coupled finite element analysis
Stability analysis
Numerical instability
Coupled algorithm
ISSN:0045-7949, 1879-2243
Online Access:Get full text
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Summary:•A stability evaluation method is proposed for magnetic damping vibration analysis.•Numerical stability is examined by stable region for coupled analysis methods.•Computing time required to obtain stable and converged solutions is compared. The numerical stability of electromagnetic and structural coupled analysis methods is examined in terms of the spectral radius for various methods combined with a coupled algorithm, time integration methods for structural analysis and eddy current analysis, and coupled effect evaluation methods. The coupled analysis method with the conventional serial staggered algorithm, generalized–α method for structure, backward difference method for eddy current, and coupled effect evaluation using previous time step results is seen to be the most suitable from the viewpoints of stability and computing time. The stability of the conventional parallel staggered algorithm is found to be much improved if the generalized–α method is used for structural analysis.
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ISSN:0045-7949
1879-2243
DOI:10.1016/j.compstruc.2016.09.003