A machine with a mass of “M" is mounted on an elastic foundation, and is found to vibrate m with a deflection of 240 mm at resonance. The unbalanced mass “m" of the motor is % 16 of mass M. If the damping ratio of the foundation is 0.072. a) Determine the eccentricity “e" of the unbalanced mass. b) Assuming that the eccentric mass remains the same, determine the mass to be added to the machine if the deflection of the machine at resonance is M required to be 150 mm.
A machine with a mass of “M" is mounted on an elastic foundation, and is found to vibrate m with a deflection of 240 mm at resonance. The unbalanced mass “m" of the motor is % 16 of mass M. If the damping ratio of the foundation is 0.072. a) Determine the eccentricity “e" of the unbalanced mass. b) Assuming that the eccentric mass remains the same, determine the mass to be added to the machine if the deflection of the machine at resonance is M required to be 150 mm.
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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Transcribed Image Text:A machine with a mass of “M" is mounted
on an elastic foundation, and is found to vibrate
with a deflection of 240 mm at resonance. The
unbalanced mass “m" of the motor is % 16 of
mass M. If the damping ratio of the foundation
is 0.072. a) Determine the eccentricity "e" of
the unbalanced mass. b) Assuming that the
eccentric mass remains the same, determine the
mass to be added to the machine if the
M
deflection of the machine at resonance is
required to be 150 mm.
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