Q11/ A disc of mass 4 kg are mounted midway between bearings which may be assumed to be simple supports. The bearing span is 480 mm. The steel shaft, which is horizontal, is 9 mm in diameter. The center of gravity of the disc is placed 3 mm from the geometric center. If the shaft rotates at 760 rpm, find (1) the stiffness of the shaft, (2) the critical speed of the shaft and (3) the amplitude of Wa b3 steady state vibration. Take E = 200 GN/m² and 8 = - 3EIL3 %3D

Q11/ A disc of mass 4 kg are mounted midway between bearings which may be assumed to be simple supports. The bearing span is 480 mm. The steel shaft, which is horizontal, is 9 mm in diameter. The center of gravity of the disc is placed 3 mm from the geometric center. If the shaft rotates at 760 rpm, find (1) the stiffness of the shaft, (2) the critical speed of the shaft and (3) the amplitude of Wa b3 steady state vibration. Take E = 200 GN/m² and 8 = - 3EIL3 %3D

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.72P

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