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Efficient evaluation of local and global deformations in impact simulations in reduced flexible multibody systems based on a quasi-static contact submodel
Publikationstyp
Conference Paper
Date Issued
2017
Sprache
English
Author(s)
Institut
TORE-URI
Volume
2017
Start Page
315
End Page
325
Citation
Proceedings of the 8th ECCOMAS Thematic Conference on MULTIBODY DYNAMICS 2017, MBD 2017 (2017-January): 315-325 (2017)
Contribution to Conference
Contact simulations with reduced flexible multibody systems can be used for an efficient analysis of the system behavior before and after impact. Due to the reduced elastic description of the bodies the numerical efficiency can be enhanced but the accuracy could decrease. For investigating the dynamical behavior before and after impact, an exact reproduction of the global motion as well as the local deformation in the contact area is required. Therefore, using static shape functions in the contact area is important for capturing the local deformation. However, due to the high eigenfrequencies introduced by these static shape functions, the numerical stiffness increases and thus the numerical efficiency decreases. Hence, the focus of this work is on the efficient contact simulation in reduced flexible multibody simulations using static shape functions. At first, the influence of damping the high frequency parts of the equations of motion on the numerical efficiency is investigated. Therefore, the determination of the required damping parameters is discussed through numerical experiments. Secondly, an approach using a quasi-static contact submodel is presented in this work. Results show that both approaches can be used for an efficient and accurate impact simulation.
Subjects
Damping
Flexible multibody systems
Impacts
Normal contact
Penalty method
Quasi-static
Submodel
DDC Class
600: Technik