whirling of shaft experiment pdf

Whirling is usually associated with fast speed of the rotating shafts. The speed in the shaft is called as “critical speed” and the act of vibrations called “whirling”. If the speed of the shaft remains to be the same then that will lead to damage in the shaft and will cause a failure.

• Explain the whirling of shafts and solve problems. • Solve problems involving mass – spring – damper systems. • Analyse the case of a harmonic disturbing force. • Analyse the case of a harmonic disturbance of the support. • Analyse the frequency response for the same. • Define and use phasors.

- the stiffness and damping of the shaft, - gyroscopic effects, and - fluid friction in bearings, will cause a shaft to bend in a complicated manner at certain rotational speeds, known as the whirling, whipping, or critical speeds.

The document provides the procedure, theoretical background, observations and sample calculations to determine critical speeds based on shaft properties and end conditions. It also presents the aim, apparatus, experimental setup, theory, observations and precautions of the experiment.

At certain speed, a rotating shaft has been found to exhibit excessive lateral Vibrations (transverse vibrations). The angular velocity of the shaft at which this occurs is called a critical speed or whirling speed or whipping speed. The frame will support motor, sliding block and shafts.

1) The document describes an experiment to demonstrate the whirling of shafts at different rotational speeds and modes using a test apparatus. 2) As a shaft's rotational speed increases and reaches its natural frequencies, it will start to vibrate transversely in different whirl modes, with nodes appearing between each whirl.

vibrations of a slender, initially bowed, rotating shaft and compares it with a simple experiment on such a shaft. It attempts thereby to give a clear picture of the resulting free and forced vibrations, the amplitudes, the phase angles, the whirling motions, and the effects of damping for this simple shaft. 2. Review of Theory -- No Damping

This document describes an experiment from the Kinematics and Dynamics Lab Manual to determine the critical or whirling speed of a rotating shaft. The experiment aims to find the speed at which a shaft will vibrate transversely due to resonance.

Whirling of Shafts Laboratory Experiment Reading Sheet. Aim: To demonstrate basic whirling. To observe 1st and 2nd mode whirling. To compare the actual whirl speeds to theoretical whirl speeds. To show that diameter affects whirling speeds. Apparatus The TM1001 TecQuipment Whirling of shafts is used in this experiment. Figure 1: Whirling of ...

This paper deals with the study of whirling of shaft with three rotors. Natural frequency of the system is found by impact hammer test followed by identifying the speed at which whirling...