Structural fatigue is supposed to be the main design driver for offshore wind turbines (OWT). Aiming at jacket substructures for OWT's, steel lattice constructions, fatigue critical welds can be found due to combined dynamic loading from wind, waves and power supply. Inspections are costly because of poor accessibility of the mostly under water located jacket welds. Moreover, equipping every weld with sensors is impracticable because of the vast number of welds. Therefore, Virtual Sensing estimates jacket fatigue using the accelerometers on the tower. This concept predicts current fatigue critical welds based on pointwise reproducing fatigue history and is already successfully applied to the welds of offshore wind turbines on monopiles substructures. The spatial estimation is performed by real-time tower measurements and extrapolation to any desired jacket location. Gathered information about fatigue-critical locations leads to a better assumption of structural health and supports maintenance measures. For example can the need of corrosion painting or inspections be backed or rejected. Overall virtual sensing will allow planning inspections more case-based, which is seen as an increase of efficiency and decrease of risk.
|Status||Published - 2017|
|Evenement||Offshore Wind Energy - London ExCel, London, United Kingdom|
Duur: 6 jun 2017 → 8 jun 2017
|Conference||Offshore Wind Energy|
|Periode||6/06/17 → 8/06/17|