Abstract
Measurements at Offshore Wind Turbine (OWT) substructures show that typical loading patterns include overloads, underloads, and shifts in mean stress cycles, due to the everchanging wind direction. These events follow each other in time and are further expressed as load sequences. Load sequences may affect the fatigue life. A novel model consisting of a set of explicit equations is developed to estimate the fatigue crack growth including effects of load sequences. The model is based on both experiments and finite element simulations. The model allows for (combinations of) over- and underloads and mean changes. With this model, an extrapolation is made towards realistic loading on OWT substructures to gain insight into the expected effect of load sequences on the fatigue life.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018 |
| Publisher | International Society of Offshore and Polar Engineers |
| Pages | 265-272 |
| Number of pages | 8 |
| ISBN (Print) | 978-188-065-387-6 |
| Publication status | Published - 1 Jan 2018 |
| Event | 28th International Ocean and Polar Engineering Conference, ISOPE 2018 - Sapporo, Japan Duration: 10 Jun 2018 → 15 Jun 2018 |
Conference
| Conference | 28th International Ocean and Polar Engineering Conference, ISOPE 2018 |
|---|---|
| Country/Territory | Japan |
| City | Sapporo |
| Period | 10/06/18 → 15/06/18 |
Keywords
- Crack growth
- Fatigue
- Load sequence effects
- Offshore Wind Turbines
- Overloads
- Underloads