Model upgrading T0 augment linear model capabilities into nonlinear regions

S B Cooper, Arnaldo Delli Carri, Dario Di Maio

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Identification of nonlinear dynamical systems have enjoyed significant progression over the past few years with the outcome of various developed identification methods, however there is still no generalised method applicable to structures with arbitrary nonlinearity. In the analysis of nonlinear dynamical system, it is essential to establish accurate and reliable tools that are capable of estimating the parameters from measured data for both the linear and nonlinear system. This paper presents a modular framework approach for upgrading a valid linear finite element structural model to accommodate any nonlinearities present in a system. To validate the efficiency of the proposed method, numerical and experimental studies are conducted on a “Multiple Beam Test Structure”, the method uses an iterative process to upgrade the nonlinear terms in the system. The results are verified by comparing predicted new response with measured data.
Original languageEnglish
Title of host publicationNonlinear Dynamics Volume 1
Subtitle of host publicationProceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016
EditorsGaetan Kerschen
PublisherSpringer International Publishing AG
Number of pages15
ISBN (Electronic)9783319297392
ISBN (Print)9783319297385
Publication statusPublished - 2016

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
PublisherSpringer International Publishing
ISSN (Print)2191-5644


  • Nonlinearities
  • Model Upgrading
  • Finite Element
  • Structural Models and Framework


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