Journal: Multibody System Dynamics

Abbreviation

Multibody syst. dyn.

Publisher

Springer

Journal Volumes

ISSN

1573-272X
1384-5640

Description

Filters

2005 - 200922010 - 20198
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Publications 1 - 10 of 10
  • Energetic consistency conditions for standard impacts Part I: Newton-type inequality impact laws and Kane's example
    Item type: Journal Article
    Glocker, Christoph (2013)
    Multibody System Dynamics
  • Modeling and analysis of planar rigid multibody systems with translational clearance joints based on the non-smooth dynamics approach
    Item type: Journal Article
    Flores, Paulo; Leine, Remco; Glocker, Christoph (2009)
    Multibody System Dynamics ~ Proceedings of the Multibody Dynamics 2009 ECCOMAS Thematic Conference, Warsaw, Poland
  • Formulation and Preparation for Numerical Evaluation of Linear Complementarity Systems in Dynamics
    Item type: Journal Article
    Glocker, Christoph; Studer, Christian (2005)
    Multibody System Dynamics
  • Rigid body dynamics with a scalable body, quaternions and perfect constraints
    Item type: Journal Article
    Möller, Michael; Glocker, Christoph (2012)
    Multibody System Dynamics
  • Energetic consistency conditions for standard impacts
    Item type: Journal Article
    Glocker, Christoph (2014)
    Multibody System Dynamics
    The paper presents a full account of Poisson’s impact law in inequality form. Based on an entirely new setting for the decompression phase, impact laws for unilateral and bilateral geometric and kinematic constraints and various friction elements are introduced and equipped with an impact coefficient in the sense of Poisson’s impulse ratio. Energetic consistency is proven for small and similar impact coefficients via the condition number of the Delassus operator. Energetic consistency is generally proven for frictionless systems, as well as for systems containing one single frictional contact. A counter-example is developed, which demonstrates a possible energy increase for Poisson impacts in the presence of more than one frictional contact.
  • Leveraging parallel computing in multibody dynamics
    Item type: Journal Article
    Negrut, Dan; Tasora, Alessandro; Mazhar, Hammad; et al. (2012)
    Multibody System Dynamics
  • A bobsleigh simulator software
    Item type: Journal Article
    Rempfler, Georg S.; Glocker, Christoph (2016)
    Multibody System Dynamics
  • Simulation of rockfall trajectories with consideration of rock shape
    Item type: Journal Article
    Leine, Remco I.; Schweizer, Andreas; Christen, Marc; et al. (2014)
    Multibody System Dynamics
    The aim of the paper is to develop a fully 3D simulation technique for rockfall dynamics taking rock shape into account and using the state-of-the-art methods of multibody dynamics and nonsmooth contact dynamics. The rockfall simulation technique is based on the nonsmooth contact dynamics method with hard contact laws. The rock is modeled as an arbitrary convex polyhedron and the terrain model is based on a high resolution digital elevation model. A specialized friction law for rockfall is proposed which allows for the description of scarring behavior (i.e., rocks tend to slide over the terrain before lift-off). The influence of rock geometry on rockfall dynamics is studied through two well-chosen numerical simulations.
  • A modal derivatives enhanced Rubin substructuring method for geometrically nonlinear multibody systems
    Item type: Journal Article
    Wu, Long; Tiso, Paolo; Tatsis, Konstantinos; et al. (2019)
    Multibody System Dynamics
    This paper presents a novel model order reduction technique for 3D flexible multibody systems featuring nonlinear elastic behavior. We adopt the mean-axis floating frame approach in combination with an enhanced Rubin substructuring technique for the construction of the reduction basis. The standard Rubin reduction basis is augmented with the modal derivatives of both free-interface vibration modes and attachment modes to consider the bending–stretching coupling effects for each flexible body. The mean-axis frame generally yields relative displacements and rotations of smaller magnitude when compared to the one obtained by the nodal-fixed floating frame. This positively impacts the accuracy of the reduction basis. Also, when equipped with modal derivatives, the Rubin method better considers the geometric nonlinearities than the Craig–Bampton method, as it comprises vibration modes and modal derivatives featuring free motion of the interface. The nonlinear coupling between free-interface modes and attachment modes is also considered. Numerical tests confirm that the proposed method is more accurate than Craig–Bampton’s, a nodal fixed floating frame counterpart originally proposed in Wu and Tiso (Multibody Syst. Dyn. 36(4): 405–425, [2016]), and produces significant speed-ups. However, the offline cost is increased because the mean-axis formulation produces operators with decreased sparsity patterns.
  • Nonlinear model order reduction for flexible multibody dynamics: A modal derivatives approach
    Item type: Journal Article
    Wu, Long; Tiso, Paolo (2016)
    Multibody System Dynamics
    An effective reduction technique is presented for flexible multibody systems, for which the elastic deflection could not be considered small. We consider here the planar beam systems undergoing large elastic rotations, in the floating frame description. The proposed method enriches the classical linear reduction basis with modal derivatives stemming from the derivative of the eigenvalue problem. Furthermore, the Craig–Bampton method is applied to couple the different reduced components. Based on the linear projection, the configuration-dependent internal force can be expressed as cubic polynomials in the reduced coordinates. Coefficients of these polynomials can be precomputed for efficient runtime evaluation. The numerical results show that the modal derivatives are essential for the correct approximation of the nonlinear elastic deflection with respect to the body reference. The proposed reduction method constitutes a natural and effective extension of the classical linear modal reduction in the floating frame.
Publications 1 - 10 of 10