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Multiparametric shell eigenvalue problems
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DOI：10.1016/j.cma.2018.09.011.png)
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Abstract
En 中文
The eigenproblem for thin shells of revolution under uncertainty in material parameters is discussed. Here the focus is on the smallest eigenpairs. Shells of revolution have natural eigenclusters due to symmetries, moreover, the eigenpairs depend on a deterministic parameter, the dimensionless thickness. The stochastic subspace iteration algorithms presented here are capable of resolving the smallest eigenclusters. In the case of random material parameters, it is possible that the eigenmodes cross in the stochastic parameter space. This interesting phenomenon is demonstrated via numerical experiments. Finally, the effect of the chosen material model on the asymptotics in relation to the deterministic parameter is shown to be negligible. (C) 2018 Elsevier B.V. All rights reserved.
Keywords:
Shells of revolution
Eigenvalue problems
Uncertainty quantification
Stochastic finite element methods
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