Dynamic force transmissibility in helical gear pairs

Abstract A new model is developed that describes mesh force transmissibility in a helical gear pair. New spectral stiffness and transmissibility matrices are developed, based on linear theory, which completely characterize the steady state forced response of a helical gear pair. New modal rating indices are also developed which can be used to rank order the importance of gear pair modes excited by various types of transmission error displacement excitations and to quantify gear mesh normal force and moment coupling. This study suggests that additional DOF must be included in the gear mesh interface model in those geared system analyses which attempt to predict structure borne noise and casing vibration associated with power transmission systems.