Dynamic Analysis of Multi-mesh Geared Rotor System Using Modal Analysis

Multi-mesh geared systems are common in many applications including rotorcraft and automotive transmissions. Coupling mechanism occurred due to gear meshing often influences dynamic characteristics of geared rotor system. This paper primarily studies the dynamic behavior of the multi-mesh rigid geared systems supported on roller bearing to include effect of gear mesh coupling in multi-mesh transmissions. This formulation combines constant mesh stiffness value in a multi-body dynamics model. Modal analysis technique is used to determine dynamic characteristics like natural frequency and forced harmonic responses of the system. The resulting modal solutions obtained for geared system are compared to study the effect of change in bearing compliance on system dynamics.