Title: Prediction of Fatigue Damage Accumulation in Metallic Structures by the Estimation of Strains from Operational Vibrations
Authors: Papadimitriou, Costas
Lourens, Eliz-Mari
Lombaert, Geert
De Roeck, Guido
Liu, Kai
Issue Date: Oct-2012
Conference: IALCCE edition:3 location:Austria, Vienna date:October 2012
Abstract: This work deals with the problem of estimating damage accumulation due to fatigue in the entire
body of a metallic structure using operational vibration measurements collected from a limited number of
sensors installed on a structure. A recently proposed joint input-state estimation filter is extended to estimate
the strain response time histories in the entire body of the structure using the output-only vibration measurements.
The estimates hold for any excitation with arbitrary temporal variation and spatial distribution over the
structure. Such predictions are then integrated with damage accumulation models, S-N fatigue curves and
rainflow stress cycle counting methods to estimate fatigue damage accumulation maps covering the entire
body of the structure. The method is validated using simulated vibration measurements for a laboratory steel
beam, generated from impulse and stochastic excitations.
Publication status: accepted
KU Leuven publication type: IC
Appears in Collections:Structural Mechanics Section

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