Jørgensen, Martin Felix2; Pedersen, Niels Leergaard1; Sørensen, Jens Nørkær3
1 Department of Mechanical Engineering, Technical University of Denmark2 Solid Mechanics, Department of Mechanical Engineering, Technical University of Denmark3 Department of Wind Energy, Technical University of Denmark4 Fluid Mechanics, Department of Wind Energy, Technical University of Denmark
We propose algorithms for developing (1) a rigid (constrained) and (2) a flexible planetary gearbox model. The two methods are compared against each other and advantages/disadvantages of each method are discussed. The rigid model (1) has gear tooth reaction forces expressed by Lagrange multipliers. The flexible approach (2) is being compared with the gear tooth forces from the rigid approach, first without damping and second the influence of damping is examined. Variable stiffness as a function of base circle arc length is implemented in the flexible approach such that it handles the realistic switch between one and two gear teeth in mesh. The final results are from modelling the planetary gearbox in a 500 kW wind turbine which we also described in Jørgensen et al. (2013).
Modeling, Identification and Control (online), 2014, Vol 35, Issue 2, p. 59-77