It's Education

     EXPERIMENT ON TORSIONAL VIBRATION OF A   DOUBLE ROTOR SHAFT AIM :: To study the torsional vibration of two rotor shaft system. APPARATUS :: Vibration test rig , vernier caliper, two rotor shaft , scale, stopwatch… THEORY ::   A rotor shaft system consists of a shaft with two rotors at both ends each, both rotor may rotate in the opposite direction [two rotors A&B having mass moment of inertia &   the rotor A&B are converted at the end with shaft having stiffness ‘K’]                        PROCEDURE ::   ·          Shaft is fixed at the two ends to the rotor with the help of chucks ·          One rotor is rotated at clockwise direction and another is rotated at anticlockwise direction . ·       ...

EXPERIMENT ON TORSIONAL VIBRATION OF A SINGLE ROTOR SHAFT AIM :: To study the torsional vibration of single rotor shaft system. APPARATUS :: Vibration test rig , vernier caliper , scale, stopwatch… THEORY :: When the particles of the shaft or disc moves in a circle about the axis of the shaft  i.e if the shaft gets alternatively twisted and untwisted on amount of vibratory system then the vibrations are known as torsional vibrations consider a shaft of negligible weights fixed at one end of and carries a rotor on the free end the amplitude of torsional vibration is maximum at the force end i.e at B and zero at fixed end i.e at A the point of section at the shaft whose amplitude of torsional vibration is zero . Torsion of circular shaft :           Mt/J = J/R = Gθ                         ...