In this work, we discuss the numerical challenges involved in the computation of the complex eigenvalues of damped multi-flexible-body problems. Aiming at the highest generality, the candidate method must be able to deal with arbitrary rigid body modes (free-free mechanisms), arbitrary algebraic constraints, and must be able to exploit the sparsity pattern of Jacobians of large systems. We propose a custom implementation of the Krylov-Schur method, proving its robustness and its accuracy in a variety of different complex test cases.

Complex Eigenvalue Analysis of Multibody Problems via Sparsity-Preserving Krylov-Schur Iterations / Mangoni, D; Tasora, A; Peng, C. - In: MACHINES. - ISSN 2075-1702. - 11:2(2023), p. 218. [10.3390/machines11020218]

Complex Eigenvalue Analysis of Multibody Problems via Sparsity-Preserving Krylov-Schur Iterations

Mangoni, D;Tasora, A;Peng, C
2023-01-01

Abstract

In this work, we discuss the numerical challenges involved in the computation of the complex eigenvalues of damped multi-flexible-body problems. Aiming at the highest generality, the candidate method must be able to deal with arbitrary rigid body modes (free-free mechanisms), arbitrary algebraic constraints, and must be able to exploit the sparsity pattern of Jacobians of large systems. We propose a custom implementation of the Krylov-Schur method, proving its robustness and its accuracy in a variety of different complex test cases.
2023
Complex Eigenvalue Analysis of Multibody Problems via Sparsity-Preserving Krylov-Schur Iterations / Mangoni, D; Tasora, A; Peng, C. - In: MACHINES. - ISSN 2075-1702. - 11:2(2023), p. 218. [10.3390/machines11020218]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2943271
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