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Stochastic modelling and updating of a joint contact interface / Michael, Friswell; Hamed, Haddad Khodaparast; Hadi, Madinei

Mechanical Systems and Signal Processing, Volume: 129, Pages: 645 - 658

Swansesa University Authors: Michael, Friswell, Hamed, Haddad Khodaparast, Hadi, Madinei

Abstract

Dynamic properties of the contact interfaces in joints and mechanical connections have a great influence on the overall dynamic properties of assembled structures. Uncertainty and nonlinearity are two major effects of contact interfaces which introduce challenges in accurate modeling. Randomness in...

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Published in: Mechanical Systems and Signal Processing
ISSN: 0888-3270
Published: 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa49935
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Abstract: Dynamic properties of the contact interfaces in joints and mechanical connections have a great influence on the overall dynamic properties of assembled structures. Uncertainty and nonlinearity are two major effects of contact interfaces which introduce challenges in accurate modeling. Randomness in surface roughness quality, surface finish and contact preload are the main sources of variability in the contact interfaces. On the other side, slip and slap are two mechanisms responsible for nonlinear behavior of joints. Stochastic linear/nonlinear models need to be developed for such uncertain structures to be used in dynamic response analysis or system parameter identification. In this paper, variability in linear behavior of an assembled structure containing a bolted lap-joint is investigated by using experimental results. A stochastic model is then constructed for the structure by employing a stochastic generic joint model and the uncertainty in the joint model parameters is identified by using a Bayesian identification approach.
Keywords: Structural joints, Stochastic modelling ,Preload, Surface roughness, Uncertainty
College: College of Engineering
Start Page: 645
End Page: 658