Shock and Vibration

Shock and Vibration / 2013 / Article

Open Access

Volume 20 |Article ID 262354 | https://doi.org/10.3233/SAV-2012-0734

Eskil Lindberg, Nils-Erik Hörlin, Peter Göransson, "Component Mode Synthesis Using Undeformed Interface Coupling Modes to Connect Soft and Stiff Substructures", Shock and Vibration, vol. 20, Article ID 262354, 14 pages, 2013. https://doi.org/10.3233/SAV-2012-0734

Component Mode Synthesis Using Undeformed Interface Coupling Modes to Connect Soft and Stiff Substructures

Received05 Dec 2011
Revised27 Apr 2012

Abstract

Classical component mode synthesis methods for reduction are usually limited by the size and compatibility of the coupling interfaces. A component mode synthesis approach with constrained coupling interfaces is presented for vibro-acoustic modelling. The coupling interfaces are constrained to six displacement degrees of freedom. These degrees of freedom represent rigid interface translations and rotations respectively, retaining an undeformed interface shape. This formulation is proposed for structures with coupling between softer and stiffer substructures in which the displacement is chiefly governed by the stiffer substructure. Such may be the case for the rubber-bushing/linking arm assembly in a vehicle suspension system. The presented approach has the potential to significantly reduce the modelling size of such structures, compared with classical component mode synthesis which would be limited by the modelling size of the interfaces. The approach also eliminates problems of nonconforming meshes in the interfaces since only translation directions, rotation axes and the rotation point need to be common for the coupled substructures. Simulation results show that the approach can be used for modelling of systems that resemble a vehicle suspension. It is shown for a test case that adequate engineering accuracy can be achieved when the stiffness properties of the connecting parts are within the expected range of rubber connected to steel.

Copyright © 2013 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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