Laboratory for Dynamics of Machines and Structures 
The influence of the coordinate reduction on the identification of the joint dynamic properties
 D. Čelič and M. Boltežar
Mech. syst. signal process., Volume 23, Issue 4, May 2009, Pages 1260-1271

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A problem of establishing a theoretical model of a joint from the measured frequency-response function (FRF) data is discussed in this paper. The model of the joint is considered as a coupled dynamic stiffness matrix, which generally includes six degrees of freedom (DoFs). For two types of least-squares solution the terms of use are clarified. The effect of coordinate reduction on the identification results is demonstrated numerically. Also the effect of added noise is studied. Using a substructure synthesis method and the identified joint dynamic properties the assembly response is reconstructed.

Damjan Čelič, PhD

  Inženirsko svetovanje in izobraževanje, Damjan Čelič, s.p.


Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
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