Analysis on rubbing dynamic characteristics of series/parallel inerter-aero engine's rotor system
In this article,in order to suppress the rotor rubbing,the inerter's vibration absorbing is applied to suppress the rubbing and improve the rotor system's stability.Firstly,the dynamic equation of the series/parallel inerter-rotor rubbing fault coupling system's motion is set up based on the D'Alembert's Principle;then,the fourth-order Runge-Kutta method is used to solve the equation numerically;the analysis is conducted on the vibration characteristics of the series/parallel inerter-aero engine's rotor system.It is shown that the amplitude of the rotor system decreases significantly by about 50％after adding the series and parallel inerters.The flapping will occur after the rotor system is attached with the series inerter;the flapping vibration intensity decreases with the ever-growing inerter coefficient and eccentricity of flywheel.After the rotor system is attached with the parallel inerter,the rubbing fault disappears and no flapping vibration occurs.The inerter coefficient is one of the sensitive parameters af-fecting the rotor system's dynamic characteristics.These results provide an effective method for vibration reduction of the aero en-gine's rotor system.
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