5) The total mass of the shown motor is 80-kg. It is observed that placing the motor on a beam produces a static downward displacement of 40-mm. When the motor rotates at an angular of 145-rev/min, the measured amplitude of the beam mid-span deflection is 10-mm. It also is observed that at a rotation rate of 145-rev/min, 50 mm the radial line to the center of mass of each rotor is 75° above horizontal when the beam is at its static reference position (where q = 0). (a) Determine the damping ratio of this vibrating system. (b) Determine the imbalance ɛm. (c) Determine the smallest possible amplitude of vibration of the beam if the motor operates at a rate that is much larger than the natural frequency of the system.

5) The total mass of the shown motor is 80-kg. It is observed that placing the motor on a beam produces a static downward displacement of 40-mm. When the motor rotates at an angular of 145-rev/min, the measured amplitude of the beam mid-span deflection is 10-mm. It also is observed that at a rotation rate of 145-rev/min, 50 mm the radial line to the center of mass of each rotor is 75° above horizontal when the beam is at its static reference position (where q = 0). (a) Determine the damping ratio of this vibrating system. (b) Determine the imbalance ɛm. (c) Determine the smallest possible amplitude of vibration of the beam if the motor operates at a rate that is much larger than the natural frequency of the system.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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