Based on finite element method(FEM) and software of Masta

the vibration response characteristics of accessory gearbox under the inner meshing excitation were calculated and analyzed. Firstly the static meshing error (displacement) excitations of gear pairs in each stage were obtained. Then the vibration response of case shell of accessory gearbox under the inner meshing excitation was researched. Finally the basic vibration characteristics of the accessory gearbox under the inner meshing excitation were discussed. The maximum vibration amplitudes obtained at key positions of the case shell are 80g lower than the limited value of 150g. The results indicate that the method and technique presented can be used effectively to predict and evalute the vibration characteristics of the accessory gearbox in design process.