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Dynamic Identification of Classically Damped Uncertain Structures

  • E. LofranoEmail author
  • A. Paolone
  • M. Vasta
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The detection of structural damping is a crucial point in structural identification. Classic techniques usually refer to deterministic systems, since the assumption of randomness in the mechanical quantities implies non-trivial analytical difficulties in the development of both the direct and the inverse problem. In some recent works, starting from the statistics of mode-shapes and (undamped) frequencies, a perturbative approach has been introduced by the authors for the estimation of mean and variance of uncertain mass and stiffness. Here dissipative structures are considered; in detail, the method is applied for the stochastic structural identification of classically damped linear dynamic systems, dependent on a random parameter, assumed to be Gaussian. A numerical validation of the technique is then presented and discussed.

Keywords

Structural identification Dynamic techniques Structural damping Uncertain structures Perturbative approach 

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Copyright information

© The Society for Experimental Mechanics, Inc. 2016

Authors and Affiliations

  1. 1.Department of Structural and Geotechnical EngineeringSapienza University of RomeRomeItaly
  2. 2.Department of Engineering and GeologyUniversity G. D’Annunzio of Chieti-PescaraPescaraItaly

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