DYNAMIC ANALYSIS ON FIXED SPEED WIND TURBINE GEAR BOX

The dynamic analysis of the wind turbine drivetrain, specifically focusing on the gearbox, is a critical aspect in ensuring the optimal design, operation, and longevity of wind turbines. This paper investigates the complexities associated with dynamic modelling of the wind turbine gearbox system. The gearbox, being an essential component of the drivetrain, transmits the mechanical power generated by the wind to the generator. Given the dynamic loads and varying operating conditions, it is necessary to develop an accurate and robust model that can predict the gearbox’s performance, stress, and vibration behaviour under real-world operating conditions. This work employs Lagrange’s formulation for modelling the gearbox system and uses a combination of analytical methods and computational techniques to achieve a comprehensive dynamic analysis. The mathematical modelling of the wind turbine gearbox involves addressing the complexities of gear meshing, shaft deflections, bearing dynamics, and the coupling effects between various components. These challenges are particularly significant due to the non-linear nature of gear teeth interactions, the stiffness and damping characteristics of the gearbox components, and the varying loads induced by the fluctuating wind speeds. By applying Lagrange’s formulation, the equations of motion for the system are derived. This approach allows for the direct inclusion of rotational degrees of freedom, angular displacements, and forces between interacting components, making it well-suited for modelling complex, multi-body systems such as a wind turbine drivetrain.