Techno Press
You logged in as Techno Press

Structural Monitoring and Maintenance
  Volume 7, Number 3, September 2020, pages 195-213
DOI: https://doi.org/10.12989/smm.2020.7.3.195
 
open access

Identification of nonlinear systems through statistical analysis of the dynamic response
Marco Breccolotti and Chiara Pozzuoli

 
Abstract
    In this paper an extension to the method for the identification of mechanical parameters of nonlinear systems proposed in Breccolotti and Materazzi (2007) for MDoF systems is presented. It can be used for damage identification purposes when damage modifies the linear characteristics of the investigated structure. It is based on the following two main features: the solution of the Fokker-Planck equation that describes the response probabilistic properties of the system when it is excited by external Gaussian loads; and a model updating technique that minimizes the differences between the response of the actual system and that of a parametric system used to identify the unknown parameters. Numerical analysis, that simulate virtual experimental tests, are used in the paper to show the capabilities of the method and to analyse the conditions required for its application.
 
Key Words
    nonlinear systems; Gaussian excitation; Fokker-Planck equation; identification
 
Address
Marco Breccolotti : Department of Civil and Environmental Engineering, University of Perugia, via G. Duranti 93, Perugia, Italy
Chiara Pozzuoli: RWDI, Via Thaon di Revel, 21, 20159, Milano, Italy
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2021 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com