An experimental study evaluating parameters effects on the vibration of rotor

Vibration in the rotary shaft is a common phenomenon observed in rotor systems. Determining the factors that cause the vibration to implement the vibration reduction measures to ensure the rotor is running stably is one of the urgent requirements today. In this paper, a machine model of rotor vibration assessment has been proposed, examining the main parameters influencing rotor vibrations, including critical speed, unbalance eccentricity and orientation angle. The experimental results show that: when the speed is around the critical speed, the vibration becomes unstable and the amplitude of the oscillation increases sharply; the orientation phase angle position causes different variations of the vibrating period leading to the imposed or superposition of tensile or compressive stresses resulting in fatigue occurring on the rotor. The present study illustrates the applicability of employing simple models to predict the dynamic response of a simple rotor system with acceptable accuracy.