For cylindrical gear pairs three types of excitations can be defined:
•A mesh excitation is defined on the path of contact. Pitch errors will lead to excitations based on gear mesh frequencies. Higher orders can be defined using the input of harmonic.
•An excitation based on roundness errors of the gear 1 can be defined. Here a variation of the radius is used. The base frequency is the rotation speed of the gear.
•An excitation based on roundness errors of the gear 2 can be defined like for gear 1.
The excitations are considered in the calculation of harmonic response. They will not affect the results of quasi-static calculation and will not affect safety factors for gears.