Sensitivity and uncertainty analysis for structural health monitoring with crack propagation under random loads: A numerical framework in the frequency domain
Corresponding Author
Denys Marques
Aeronautical Engineering Department, São Carlos School of Engineering, University of São Paulo, São Carlos, Brazil
Correspondence
Denys Marques, Aeronautical Engineering Department, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil.
Email: [email protected]
Search for more papers by this authorDirk Vandepitte
Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
Search for more papers by this authorVolnei Tita
Aeronautical Engineering Department, São Carlos School of Engineering, University of São Paulo, São Carlos, Brazil
Department of Mechanical Engineering, Faculty of Engineering of University of Porto, Porto, Portugal
Search for more papers by this authorCorresponding Author
Denys Marques
Aeronautical Engineering Department, São Carlos School of Engineering, University of São Paulo, São Carlos, Brazil
Correspondence
Denys Marques, Aeronautical Engineering Department, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil.
Email: [email protected]
Search for more papers by this authorDirk Vandepitte
Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
Search for more papers by this authorVolnei Tita
Aeronautical Engineering Department, São Carlos School of Engineering, University of São Paulo, São Carlos, Brazil
Department of Mechanical Engineering, Faculty of Engineering of University of Porto, Porto, Portugal
Search for more papers by this authorFunding information: National Council for Scientific and Technological Development, Grant/Award Number: 310656/2018-4; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES), Grant/Award Number: Finance Code 001
Abstract
The quantification of uncertainties in a system and the ability to identify the most influential parameters for a given structural health monitoring (SHM) strategy constitutes an important step for an in-depth analysis of the problem. It is used in reliability assessment and for the definition of proper inspection intervals. In a recent paper, the authors proposed a methodology for SHM and fatigue life estimations of structures under random loads. This paper expands over those concepts and presents a framework for sensitivity and uncertainty analysis for SHM of structures in the frequency domain. The structure is an Euler–Bernoulli beam, which is modeled with the Ritz method. The conceptual simplicity of the Ritz model keeps the computational cost low. The results showed that the Walker parameter for the crack propagation law, ; the modal damping factor; and the input acceleration are important parameters affecting the variance of the remaining useful life.
CONFLICT OF INTEREST
The authors declare that they have no conflicts of interest.
Open Research
DATA AVAILABILITY STATEMENT
The data presented in this manuscript can be made available upon reasonable request.
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