1- A shaft carrying a rotor of weight 100 lb has an eccentricity of 0.1 in rotates at 1200 rpm. Determine, a- The steady state whirl amplitude b- The maximum whirl amplitude during start up condition of the system. The shaft stiffness is 200000 lb/in and the external damping ratio is 0.1

1- A shaft carrying a rotor of weight 100 lb has an eccentricity of 0.1 in rotates at 1200 rpm. Determine, a- The steady state whirl amplitude b- The maximum whirl amplitude during start up condition of the system. The shaft stiffness is 200000 lb/in and the external damping ratio is 0.1

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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Concept explainers

Free Damped Vibrations

Free vibration is a type of vibration in which the external force is removed after giving the initial displacement to a body/system. In other words, in this type of vibration, force is applied at the initial displacement of the system, and after the initial displacement, force is removed, and the system vibrates at the natural frequency.

Question

1- A shaft carrying a rotor of weight 100 lb has an eccentricity of 0.1 in rotates at
1200 rpm. Determine,
a- The steady state whirl amplitude
b- The maximum whirl amplitude during start up condition of the system.
The shaft stiffness is 200000 lb/in and the external damping ratio is 0.1
2- A single-story building frame is
subjected to a harmonic ground
acceleration, as shown in Fig. Find
the steady-state motion of the floor
(mass m).
(1) = A cos cof

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Step 3: Steady state whirl amplitude

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Step 4: Maximum whirl amplitude during start up condition of the system

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