Operational Modal Analysis based Stress Estimation in Friction Systems

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It is possible to estimate the strain response of a structure in unmeasured points by the use of operational modal analysis and modal expansion. Both techniques are based on the assumption that the system is linear. However, this is not always the case since nonlinear elements often violate this assumption. In this paper, the precision of estimating the strain response of a nonlinear system is investigated using the operational response of numerical simulations. Local nonlinearities are introduced by adding friction to the test specimen and this paper finds that this approach of strain estimation can still predict the strains with high precision.
Original languageEnglish
Title of host publicationNonlinear Dynamics, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series
EditorsG. Kerschen
Publication date2018
ISBN (Print)978-3-319-74279-3
ISBN (Electronic)978-3-319-74280-9
Publication statusPublished - 2018
Event36th International Modal Analysis Conference - Orlando, United States
Duration: 12 Feb 201815 Feb 2018
Conference number: 36


Conference36th International Modal Analysis Conference
CountryUnited States


  • Operational modal analysis
  • Strain estimation
  • Modal expansion
  • Structural health monitoring
  • Non-linear dynamics

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