Laboratory for Dynamics of Machines and Structures 
A mixed-contact formulation for a dynamics simulation of flexible systems: an integration with model-reduction techniques
 B. Starc, G. Čepon and M. Boltežar
Journal of Sound and Vibration, Volume 393, April 2017, Pages 145-156

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Abstract
A new numerical procedure for efficient dynamics simulations of linear-elastic systems with unilateral contacts is proposed. The method is based on the event-driven integration of a contact problem with a combination of single- and set-valued force laws together with classical model-reduction techniques. According to the contact state, the developed event-driven integration enables the formulation of reduced system matrices. Moreover, to enable the transition among different reduced spaces the formulation of the initial conditions is also presented. The method has been developed separately for each of the four most popular model-reduction techniques (Craig-Bampton, MacNeal, Rubin and Dual Craig-Bampton). The applicability of the newly presented method is demonstrated on a simple clamped-beam structure with a unilateral contact, which is excited with a harmonic force at the free end.
Authors

Young researcher

Blaž Starc, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  blaz.starc@fs.uni-lj.si
  +386 1 4771 228

Assistant Professor

Gregor Čepon, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  gregor.cepon@fs.uni-lj.si
  +386 1 4771 229
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Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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