Modal sensitivity of three-dimensional planetary geared rotor systems to planet gear parameters

A parameter study is presented to determine effects of planet gear design parameters on the global modal behaviour planetary geared rotor systems. The sensitivity analysis conducted using a three-dimensional dynamic model system for number gears, mistuning, mass mesh stiffness and speed. These have varying impacts both natural frequencies mode shapes, therefore vibration modes determined by computing frequency shifts comparing shapes. results show that gears larger influence response. Torsional coupled torsional-axial are more sensitive whereas lateral gearbox mass. Planet mistuning in coupling between torsional vibrations. becomes rigid flexible with an increase gears. also found be having significant gyroscopic inside gearbox. main original findings this can directly used as initial guidelines design.