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Shock and Vibration
Volume 17, Issue 4-5, Pages 373-381

Modelling of Damping Force of Dynamically Loaded Specimen of Polyurethane Foam in Dependence on Its Density

David Cirkl

Technical University of Liberec, Department of Mechanical Engineering, Studentska 2, Liberec 460 01, Czech Republic

Received 17 June 2010; Accepted 17 June 2010

Copyright © 2010 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.


Article deals with measurement and modelling of damping force of polyurethane foam specimen being compressed. The specimens were taken from car seats and differ by material density. For modelling of damping force during harmonical kinematical excitation the explicit formula is used. Its parameters are found by means of method based on evaluation of energy dissipated during one loading cycle and also on evaluation of position of damping force extreme.