Question: The rotor of a turbine having the form of a disk is mounted at the midspan of a uniform steel shaft, as shown in Fig. The mass of the disk is 15 kg and its diameter is 0.3 m. The disk has a circular hole of diameter 0.03 m at a distance of 0.12 m from the geometric center. The bending stiffness of the shaft is El = 1, 600Nm2. Determine the amplitude of vibration if the turbine rotor rotates with the angular velocity of 6,000 rpm. Assume that the shaft bearings are rigid.
