Stochastic Modelling and Updating of a Joint Contact Interface

H Jalali, H Haddad Khodaparast, H Madinei & MI Friswell (Swansea University)

Mechanical Systems and Signal Processing, Vol. 129, 15 August 2019, pp. 645-658

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 modelling. 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 behaviour 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 behaviour 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.

Paper Availability

This material has been published in the Mechanical Systems and Signal Processing, Vol. 129, 15 August 2019, pp. 645-658, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by Elsevier.


Link to paper using doi: 10.1016/j.ymssp.2019.04.003

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