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• W2937505514 startingPage "463" @default.
• W2937505514 abstract "The damage detection problem becomes a more difficult task when the intrinsically nonlinear behavior of the structures and the natural data variation are considered in the analysis because both phenomena can be confused with damage if linear and deterministic approaches are implemented. Therefore, this work aims the experimental application of a stochastic version of the Volterra series combined with a novelty detection approach to detect damage in an initially nonlinear system taking into account the measured data variation, caused by the presence of uncertainties. The experimental setup is composed by a cantilever beam operating in a nonlinear regime of motion, even in the healthy condition, induced by the presence of a magnet near to the free extremity. The damage associated with mass changes in a bolted connection (nuts loosed) is detected based on the comparison between linear and nonlinear contributions of the stochastic Volterra kernels in the total response, estimated in the reference and damaged conditions. The experimental measurements were performed on different days to add natural variation to the data measured. The results obtained through the stochastic proposed approach are compared with those obtained by the deterministic version of the Volterra series, showing the advantage of the stochastic model use when we consider the experimental data variation with the capability to detect the presence of the damage with statistical confidence. Besides, the nonlinear metric used presented a higher sensitivity to the occurrence of the damage compared with the linear one, justifying the application of a nonlinear metric when the system exhibits intrinsically nonlinear behavior." @default.
• W2937505514 created "2019-04-25" @default.
• W2937505514 creator A5008879386 @default.
• W2937505514 creator A5052874876 @default.
• W2937505514 creator A5062225938 @default.
• W2937505514 creator A5074505125 @default.
• W2937505514 date "2019-08-01" @default.
• W2937505514 modified "2023-10-15" @default.
• W2937505514 title "Damage detection in an uncertain nonlinear beam based on stochastic Volterra series: An experimental application" @default.
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• W2937505514 doi "https://doi.org/10.1016/j.ymssp.2019.03.045" @default.
• W2937505514 hasPublicationYear "2019" @default.
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