Computational Framework for Online Estimation of Fatigue Damage using Vibration Measurements from a Limited Number of Sensors
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Author / Producer
Date
2017
Publication Type
Conference Paper
ETH Bibliography
yes
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Abstract
This study proposes a computational framework for the online estimation of fatigue damage using operational vibration measurements from a limited number of sensors. To infer the stress response time histories required for fatigue prediction, the measured structural response is driven to a high fidelity finite element (FE) model, which is reconciled using appropriate model updating techniques that minimize the discrepancy between the experimental and analytical frequency response functions (FRFs). Fatigue is accordingly estimated via the Palmgren-Miner rule, while the available FE model allows for stress estimation at unmeasured spots. The method is successfully validated and assessed through an experimental study that pertains to a linear steel substructure supporting the entire body of a pre-beater assembly at a PPC power plant.
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Publication status
published
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Book title
Journal / series
Volume
199
Pages / Article No.
1906 - 1911
Publisher
Elsevier
Event
X International Conference on Structural Dynamics, EURODYN 2017
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
FE Model Updating; Strain and Fatigue Predictions; System Identification; Output-Only Measurements.
Organisational unit
03890 - Chatzi, Eleni / Chatzi, Eleni