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Reliability-Based Fatigue Life Estimation of Ocean Current Turbine Rotor Blades

[+] Author Affiliations
Shaun Hurley, Madasamy Arockiasamy

Florida Atlantic University, Boca Raton, FL

Paper No. OMAE2011-49760, pp. 637-644; 8 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5: Ocean Space Utilization; Ocean Renewable Energy
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4437-3
  • Copyright © 2011 by ASME


The study presents a reliability-based fatigue life prediction model for the ocean current turbine rotor blades. Using the short-term distribution of the bending moment ranges, the 2-parameter Weibull distribution is used to fit the bending moment range data to obtain the long-term distribution. The long-term distribution is used to determine the number of load cycles for any given bending moment range. The published laboratory test data in the form of the ε-N curve is used in conjunction with the long-term distribution of the bending moment ranges in the prediction of the fatigue failure of the rotor blade using Miner’s rule. Future work on the reliability analyses and partial safety factors are included in the paper.

Copyright © 2011 by ASME



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