Like vibrating strings and other elastic structures, shafts and beams can vibrate in different. For a rotating shaft there is a speed at which, for any small initial deflection, the centripetral force. Standard gravity g = 9. Therefore, the calculation of critical speed for fan shaft is necessary. There are two method used to calculate critical speed, Rayleigh.
Nov Critical or whirling or whipping speed is the speed at which the shaft tends to vibrate violently in transverse direction. Impactacademyofficial Free Engineering Video Lectures.
The eccentricity of the C. In solid mechanics, in the field of rotordynamics, the critical speed is the theoretical angular velocity that excites the natural frequency of a rotating object, such as a. Critical speed refers to the first natural frequency at which a rotating shaft begins to vibrate. Let us write down the force equilibrium equation as follows, following the.