Abstract: Unbalance and misalignment, both are most common causes of machine vibration which reduces life of the machine. In this paper, experimental studies were performed on a rotor dynamic test apparatus to predict the vibration spectrum for rotor unbalance and misalignment. A self-designed simplified flexible coupling was used in the experiments. The rotor shaft accelerations were measured at three different speed using FFT four channel vibration analyzer (ADASH) under the unbalance and misalignment conditions. The experimental frequency spectra were also obtained for unbalanced and misalignment condition.
Keywords: Unbalance, Misalignment, Rotor system, FFT.