Laboratory for Dynamics of Machines and Structures 
Introduction of the linear contact model in the dynamic model of laminated structure dynamics: an experimental and numerical identification
 M. Pirnat, G. Čepon and M. Boltežar
Mechanism and Machine Theory, Vol. 64, Pages 144–154

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Abstract
A numerical model of a laminated stack’s dynamics applicable to general laminated structures was developed. A simple linear contact model facilitated the computational efficiency and in this way enabled the modelling of the stack’s dynamics using a large number of laminas. The numerical model employs contact elements characterized by stiffness and damping parameters in a tangential contact direction and nonlinear contact stiffness in a normal contact direction. In order to identify the contact element parameters and to validate the developed numerical model of the laminated stack, several stack configurations were investigated using experimental modal analysis. The identified modal parameters were used in the optimization process to extract the contact element parameters. This made it possible to analyse the effects of the steel type, producer type, additional silicon layers and other treatments on the laminated stack’s dynamics.
Authors

R&D

Miha Pirnat, PhD

  Kolektor Etra d.o.o.
  miha.pirnat@kolektor.com
  
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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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