Stochastic modelling and updating of a joint contact interface

Hassan Jalali, Hamed Haddad Khodaparast, Hadi Madinei, Michael I Friswell

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
454 Downloads (Pure)


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.

Original languageEnglish
Pages (from-to)645-658
Number of pages14
JournalMechanical Systems and Signal Processing
Early online date3 May 2019
Publication statusPublished - 15 Aug 2019
Externally publishedYes


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