Comparative Study of Time-Domain Fatigue Assessments for an Offshore Wind Turbine Jacket Substructure by Using Conventional Grid-Based and Monte Carlo Sampling Methods
Abstract
:1. Introduction
2. Long-Term Environmental Statistics and Sampling
2.1. Grid-Based Method
2.2. MC Method
3. Substructure Model Description and Load Generation
3.1. Sea Loads
3.2. Wind Loads
4. Fatigue Lifetime Assessment
4.1. Hot-Spot Stress Evaluation
4.2. S–N Curve and Welding Effect
4.3. Fatigue Damage Calculation
5. Results and Discussion
5.1. Uncertainty of Fatigue Damage
5.2. High-Dimensional Fatigue Analysis
6. Concluding Remarks
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Wind Speed | 7.5 m/s | 12.5 m/s | 17.5 m/s | 22.5 m/s |
---|---|---|---|---|
Maximum (MAX) | ||||
Minimum (MIN) | ||||
Average (AVG) | ||||
MAX/AVG | 206.9% | 224.6% | 168.2% | 154.0% |
MIN/AVG | 42.1% | 52.5% | 47.0% | 59.6% |
STD | ||||
CV | 0.420 | 0.288 | 0.249 | 0.218 |
Wave Height | 0.75 m | 1.25 m | 1.75 m |
---|---|---|---|
Maximum (MAX) | |||
Minimum (MIN) | |||
Average (AVG) | |||
MAX/AVG | 231.0% | 225.2% | 325.0% |
MIN/AVG | 38.9% | 32.3% | 35.1% |
STD | |||
CV | 0.407 | 0.419 | 0.487 |
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Chian, C.-Y.; Zhao, Y.-Q.; Lin, T.-Y.; Nelson, B.; Huang, H.-H. Comparative Study of Time-Domain Fatigue Assessments for an Offshore Wind Turbine Jacket Substructure by Using Conventional Grid-Based and Monte Carlo Sampling Methods. Energies 2018, 11, 3112. https://doi.org/10.3390/en11113112
Chian C-Y, Zhao Y-Q, Lin T-Y, Nelson B, Huang H-H. Comparative Study of Time-Domain Fatigue Assessments for an Offshore Wind Turbine Jacket Substructure by Using Conventional Grid-Based and Monte Carlo Sampling Methods. Energies. 2018; 11(11):3112. https://doi.org/10.3390/en11113112
Chicago/Turabian StyleChian, Chi-Yu, Yi-Qing Zhao, Tsung-Yueh Lin, Bryan Nelson, and Hsin-Haou Huang. 2018. "Comparative Study of Time-Domain Fatigue Assessments for an Offshore Wind Turbine Jacket Substructure by Using Conventional Grid-Based and Monte Carlo Sampling Methods" Energies 11, no. 11: 3112. https://doi.org/10.3390/en11113112