期刊
MULTIBODY SYSTEM DYNAMICS
卷 17, 期 2-3, 页码 157-176出版社
SPRINGER
DOI: 10.1007/s11044-007-9039-5
关键词
flexible multibody systems; model reduction; Gramian matrix; Krylov-subspaces; large-scale systems
类别
In this work, a two-step approach for model reduction in flexible multibody dynamics is proposed. This technique is a combination of the Krylov-subspace method and a Gramian matrix based reduction approach that is particularly suited if a small reduced-order model of a system charged with many force-inputs has to be generated. The proposed methodology can be implemented efficiently using sparse matrix techniques and is therefore applicable to large-scale systems too. By a numerical example, it is demonstrated that the suggested two-step approach has very good approximation capabilities in the time as well as in the frequency domain and can help to reduce the computation time of a numerical simulation significantly.
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