Question

Question no. 3 (20 marks) The rotor of a portable generator spins at 3600 RPM. The mass of the rotor, including all rotating components (shaft and rotor windings) is 10 kg. The rotor has an unbalance of $m_o e = 0.3$ kg-m. The oil bearings provide a total effective stiffness of 40 kN/m and damping of 60 N-s/m. a) What is the amplitude of the vibration? b) What is the amplitude of the transmitted force to the foundation?

          Question no. 3 (20 marks)
The rotor of a portable generator spins at 3600 RPM. The mass of the rotor, including all rotating
components (shaft and rotor windings) is 10 kg. The rotor has an unbalance of $m_o e = 0.3$ kg-m. The oil
bearings provide a total effective stiffness of 40 kN/m and damping of 60 N-s/m.
a) What is the amplitude of the vibration?
b) What is the amplitude of the transmitted force to the foundation?

Question no. 3 (20 marks)
The rotor of a portable generator spins at 3600 RPM. The mass of the rotor, including all rotating
components (shaft and rotor windings) is 10 kg. The rotor has an unbalance of mo e = 0.3 kg-m. The oil
bearings provide a total effective stiffness of 40 kN/m and damping of 60 N-s/m.
a) What is the amplitude of the vibration?
b) What is the amplitude of the transmitted force to the foundation?

Added by Cynthia S.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Aparna Shakti

Step 1

This can be done using the formula: F = mo e ω^2 where F is the unbalanced force, mo e is the unbalance mass, and ω is the angular velocity in radians per second. Converting the RPM to radians per second, we get: ω = 2π(3600/60) = 377 rad/s Substituting the Show more…

Show all steps

Thanks for your feedback!

The rotor of a portable generator spins at 3600 RPM. The mass of the rotor, including all rotating components (shaft and rotor windings), is 10 kg. The rotor has an unbalance of moe = 0.3 kg-m. The oil bearings provide a total effective stiffness of 40 kN/m and damping of 60 N-s/m. a) What is the amplitude of the vibration? b) What is the amplitude of the transmitted force to the foundation? Question no.3 (20 marks): The rotor of a portable generator spins at 3600 RPM. The mass of the rotor, including all rotating components (shaft and rotor windings), is 10 kg. The rotor has an unbalance of moe = 0.3 kg-m. The oil bearings provide a total effective stiffness of 40 kN/m and damping of 60 Ns/m. a) What is the amplitude of the vibration? b) What is the amplitude of the transmitted force to the foundation? Only consider vertical motion about the equilibrium position.