Modelling and analysis of offshore wind turbine gearbox under multi-field coupling

Offshore wind power has become a critical source of clean energy globally. However, during the operation of offshore wind turbines, the gearbox is subjected to various uncertainties, such as heat and humidity, which can alter its strength and impact the turbine's performance, potentially leading to severe consequences like turbine failure. To analyse the factors influencing gearbox strength, this study investigates various failure modes of gearboxes and conducts simulation analyses on the gears most likely to fail. Additionally, the study integrates multiple physical fields to comprehensively calculate the strength and lifespan of the gears, while analysing crack propagation under these conditions. Finally, statistical methods are employed to analyse the reliability of the gears, exploring the sensitivity of output parameters such as gear lifespan to various input factors.