1,190 research outputs found
Information Technology in project-organized electronic and computer technology engineering education
Riskâbased derivation of target reliability levels for life extension of wind turbine structural components
Abstract The main wind turbine design standard IEC61400â1 ed. 4 includes an annual target reliability index for structural components of 3.3. Presently, no standards specify specific reliability requirements for existing wind turbines, to be used in relation to verification of structural integrity for life extension or continued operation. For existing structures in general, both economic and sustainability considerations support differentiation in reliability targets, as it is generally more expensive and requires more resources to improve the reliability. ISO2394 âGeneral Principles on Reliability for Structuresâ includes tables with differentiated reliability targets depending on the consequences of failure and costs of improving reliability, which are derived using riskâbased economic optimization. However, the assumptions behind these tables do not match the specific problem of life extension of wind turbines. In this paper, the riskâbased approach is applied to derive specific target reliability levels for life extension of wind turbines, and a target annual reliability index around 3.1 is proposed
Computational framework for risk-based planning of inspections, maintenance, and condition monitoring using discrete Bayesian networks
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