The flywheel of a generator set weighs 150 kg and its radius of gyration is 25 cm. The diameter of flywheel shaft is 4.5 cm and length is 22 cm. The mass of armature is 90 kg and radius of gyration is 20 cm. The dynamo shaft is 4 cm in diameter and 18 cm long. Determine frequency of torsional vibration. Neglect inertia of shaft and coupling. Assume G = 8.24 × 10 6 N/cm

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Forced undamped vibrations

In mechanical engineering, vibration is expressed as the term that occurs due to an object's backward and forward movement about a point of equilibrium. Generally, there are three types of vibrations which are,