7) In one device, the disc is held in place by a torsion spring and an adhesive damper. Mass inertia torque, J of this disk is equal to 7.2 * 10-6 kg.m² . The vibration period of this disk is 4.2 seconds and the damping ratio of this system is 0.5399. Find: A) A)Natural frequency B) Spring stiffness and damping of the adhesive damper

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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7) just solve i - ii

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7) In one device, the disc is held in place by a torsion spring and an adhesive
damper. Mass inertia torque, J of this disk is equal to 7.2 * 10-6 kg.m² . The
vibration period of this disk is 4.2 seconds and the damping ratio of this
system is 0.5399. Find:
A) A)Natural frequency
B) Spring stiffness and damping of the adhesive damper
* If the system is assumed to be upright and can respond to a sudden
shock by rotating the disc by 25 degrees, it is desirable:
i)
Time required to reach 25 degrees of rotation
ii)
The initial velocity generated by the sudden vibration
Transcribed Image Text:7) In one device, the disc is held in place by a torsion spring and an adhesive damper. Mass inertia torque, J of this disk is equal to 7.2 * 10-6 kg.m² . The vibration period of this disk is 4.2 seconds and the damping ratio of this system is 0.5399. Find: A) A)Natural frequency B) Spring stiffness and damping of the adhesive damper * If the system is assumed to be upright and can respond to a sudden shock by rotating the disc by 25 degrees, it is desirable: i) Time required to reach 25 degrees of rotation ii) The initial velocity generated by the sudden vibration
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