Reference : Time integration of nonsmooth mechanical systems using constraints at position, veloc...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Mechanical engineering
http://hdl.handle.net/2268/224591
Time integration of nonsmooth mechanical systems using constraints at position, velocity and acceleration levels
English
Bruls, Olivier mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques >]
Acary, Vincent []
Cardona, Alberto []
Jun-2018
Proceedings of the 5th Joint International Conference on Multibody System Dynamics
2 pages
Yes
Yes
International
5th Joint International Conference on Multibody System Dynamics
June 24-28, 2018
Lisbon
Portugal
[en] Nonsmooth dynamics ; Time stepping ; Impact
[en] The nonsmooth generalized-alpha method aims at the simulation of nonsmooth mechanical systems with elastic bodies. It is based on a separation of smooth and nonsmooth contributions in the equations of motion, so that the nonsmooth contributions are integrated using a consistent backward Euler scheme whereas smooth contributions can be integrated with a higher accuracy. The smooth and nonsmooth motions are nevertheless inherently coupled, so that the numerical solution can be affected by spurious numerical oscillations after the impacts. In this work, we show that these numerical oscillations can be fully eliminated provided that the equations defining the smooth motion involve the constraints at acceleration level with a suitable activation strategy. At every time step, the algorithm thus enforces the bilateral and active unilateral constraints at position, velocity and acceleration levels.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/224591

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