An analysis of the vibration of rotor system with engagement of bevel gears

The object for this study is the rotor-support system of a bigger transmission power aeroengine with engaged action of central bevel gears and Square Film Damper (SFD), critical speed and natural frequency of transverse vibration and static unbalance response and intial bending response are computed by using the transfer matrixes of bending-torsional coupling method. The main aim is to study the amplitude-frequency character of support force with engaged action of bevel gears; to find a method for determining peak speeds; to discover peak speeds of maximal amplitude of support force beyond critical speeds when a system has engagement of central bevel gears; and to analyse the test curve of amplitude-frequency character. For the case, we put forward the methods for decreasing vibration at the peak speeds and study the influence of support plan for vibrational character of rotor-support system of the aeroengine.