The calculation method of the whole gearbox deformation is proposed by the application of superposition principle

including the gear box case body

bearing

shaft and gears.The flexibility matrix of the gear box case body is generated by using the rigid coupling function in ANSYS.Accordingly

the deformation of the gear box case body is gained by solving the relationship equation of the flexibility matrix

load vector and deformation vector.Taking a wind turbine speed increasing gear box as an example

the influence of the whole gearbox deformation on the reaction force of the supporting points and the bending stress is analyzed.