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DINAME2019
DINAME2019
Flexible Multibody Simulations with Global Shape Functions Obtained from Isogeometric Finite Element Models
Submission Author:
Alexander Held , Hamburg , Germany
Co-Authors:
Alexander Held
Presenter: Alexander Held
doi://10.26678/ABCM.DINAME2019.DIN2019-0136
Abstract
Dynamic mechanisms, whose bodies undergo both large nonlinear rigid body motions and elastic deformations can be modeled and analyzed using the method of flexible multibody systems. In case the deformations are small and elastic the floating frame of reference formulation is often the most efficient modeling approach. The deformations are here approximated using a set of global shape functions. In this work it is shown how the global shape functions can be determined from isogeometric finite element models by modal reduction. As application example a planar flexible slider-crank mechanisms is used. Isoparametric and isogeometric finite element models are created for the flexible piston rod. The resulting eigenfrequencies and the results of the flexible multibody simulations are compared.
Keywords
floating frame of reference, isogeometric finite element models, modal reduction
