As default a gear is just considered as a load element and it adds neither mass nor stiffness to the shafts.
Optionally the gear body can be considered as mass and stiffness. Available options are:
•"Increase shaft diameter": If this option is selected, the shaft diameter is increased to root diameter plus 0.4*module automatically. For the root diameter a dedendum of the reference profile of 1.25 is assumed. The shaft will be too stiff using this option as it cannot deform inside the gear body.
•"3D-model using central nodes": A 3D-FEA model is used for the gear body with the restriction that the inner and the outer cylinder will stay cylindrical. The torsional and bending deformations at the inner and the outer diameter can be different because of the 3D-model. The outer diameter of the 3D-model is set to the root diameter plus 0.4*module. The same material properties as for the shaft are used.
•"3D-model": A 3D-FEA model is used for the gear body as if a 3D-elastic parts as elastic gear is used. The license for 3D-elastic parts is required. The torsional and bending deformations at the inner and the outer diameter can be different because of the 3D-model. The outer diameter of the 3D-model is set to the root diameter plus 0.4*module. The same material properties as for the shaft are used.
•"3D-model with teeth": A 3D-FEA model is used for the gear body as if a 3D-elastic parts as elastic gear is used and the teeth are added to the 3D-model. The license for 3D-elastic parts is required. The torsional and bending deformations at the inner and the outer diameter can be different because of the 3D-model. This option will need much more initial calculation time and needs to be updated on every change of gear data. Therefore it should only be activated in the end phase of the design. The same material properties as for the shaft are used.
