Research On Regid-flexible Coupled Dynamic Simulation For Wind Turbine Gear Box

The gear box of wind turbine generator system is a rigid-flexible coupling system, will vibrate in a variety of excitation. Wind turbine gear box is the most important one of transmission components, in the heavy high-speed conditions will be reflected in the deformation properties of flexible components, vibration, to reduce the motion accuracy, and led by the impact of gear transmission system, produces wear, fatigue gear. According to the technical requirements, this dissertation determined the parameters of the gear and designed the structure of gear box. Create three-dimensional model using UG software. Use the data interface of UG software and ADAMS software, take three-dimensional model into ADAMS software, and replaced the Rigid frame easily damaged parts-----high-speed gears, planetary gear, medium-speed shaft, the rack for flexible generated coupling of the gear box model.To be more precise dynamic data of gearbox, this dissertation will be based on the actual situation on the steady-state load, Shock loads and random load analysis of the dynamic characteristics of the gear box, simulated the gear meshing force of each gear meshing force by the time domain maps and were compared with the theoretical data, For fragile parts such as gear, high speed gear, has been conducted every ten times the maximum node stress and strain by flexibility analysis. And subject to the maximum stress and strain analysis of the nodes have been further changes in stress-strain curves,vulnerable to the gear to predict the location and time of danger. In order to obtain the vibration characteristics of the internal gearbox, in this dissertation, the speed of each gear and the gear meshing force was FFT transform. Received the vibration frequency of the gear, meshing frequency and its harmonics by FFT transform, provide a theoretical basis for optimal design of gear box.