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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/10766

Title: Fatigue lifetime estimation in structures using ambient vibration measurements
Authors: Papadimitriou, Costas
Fritzen, Claus-Peter
Kraemer, Peter
Ntotsios, Evangelos
Keywords: Stochastic fatigue
Damage accumulation
Prognosis
Kalman filter
Stochastic dynamics
Spectral methods
Issue Date: 2009
Publisher: National Technical University of Athens, Greece (© The authors)
Citation: PAPADIMITRIOU, C. ... et al, 2009. Fatigue lifetime estimation in structures using ambient vibration measurements. IN: Papadrakakis, M., Lagaros, N.D., Fragiadakis, M. (eds.). 2nd ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2009), Rhodes, Greece, 22-24 June, pp.45-60.
Abstract: A methodology is proposed for estimating damage accumulation due to fatigue in the entire body of a metallic structure using output-only vibration measurements from a sensor network installed at a limited number of structural locations. Available frequency domain stochastic fatigue methods based on Miner’s damage rule, S-N fatigue cycle curves and Dirlik’s probability distribution of the stress range are used to predict the expected fatigue accumulation of the structure in terms of the power spectral density of the stress processes. In predicting the damage and fatigue lifetime, it is assumed that the unmeasured excitations can be modeled by stationary stochastic processes. The power spectral densities of stresses at unmeasured locations are estimated from the response time history measurements available at the limited measured locations using Kalman filter and a model of the structure. The proposed formulation is demonstrated using a MDOF spring-mass chain model arising from structures that consist of members with uniaxial stress states.
Description: This is a conference paper.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/10766
ISBN: 9789602546826
9602546824
Appears in Collections:Conference Papers (Civil and Building Engineering)

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