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Random Loads Fatigue: The Simulation of Non-Linear Systems

[+] Author Affiliations
Filippo Cianetti, Claudio Braccesi

University of Perugia, Perugia, Italy

Paper No. DETC2009-86251, pp. 687-702; 16 pages
doi:10.1115/DETC2009-86251
From:
  • ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
  • San Diego, California, USA, August 30–September 2, 2009
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4898-2 | eISBN: 978-0-7918-3856-3
  • Copyright © 2009 by ASME

abstract

In this paper the problem of the correct evaluation of the stress state of mechanical components of non linear systems in the frequency domain was analysed. This is one of the most important steps in the frequency domain evaluation of the fatigue behaviour of components under random loads. A new methodology to obtain an accurate representation in frequency domain of the non-linear behaviour of the system as well as of the stress state of the components both in terms of power spectral density (PSD) function and of frequency response function (FRF) was proposed and validated. This methodology fits well into a damage evaluation scenario that also involves the non Gaussianity of the process.

Copyright © 2009 by ASME

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