Mechanical Engineering - Theory of machines - Discussion
Discussion Forum : Theory of machines - Section 1 (Q.No. 9)
9.
The factor which affects the critical speed of a shaft is
Discussion:
22 comments Page 1 of 3.
Prathmesh said:
3 years ago
The answer is only mass and stiffness span and diameter of rotor not eccentricity.
Ganeshr said:
4 years ago
Given ans is correct.
Critical or whirling or whipping speed is the speed at which the shaft tends to vibrate violently in the transverse direction.
The critical speed essentially depends on;
1. The eccentricity of the C.G of the rotating masses from the axis of rotation of the shaft.
2. Diameter of the disc,
3. Span (length) of the shaft, and.
4. Type of supports connections at their ends.
Critical or whirling or whipping speed is the speed at which the shaft tends to vibrate violently in the transverse direction.
The critical speed essentially depends on;
1. The eccentricity of the C.G of the rotating masses from the axis of rotation of the shaft.
2. Diameter of the disc,
3. Span (length) of the shaft, and.
4. Type of supports connections at their ends.
(1)
Pabitra said:
7 years ago
The answer will be A and B. w n is proportional to d^2/l^1.5.
So it does not depend upon eccentricity.
So it does not depend upon eccentricity.
Anand said:
7 years ago
What is eccentricity?
Shekhar said:
8 years ago
Critical speed is independent of eccentricity.
Raj said:
8 years ago
Both A and B are correct. C is not answer.
Mitesh morwal said:
8 years ago
Answer will be [A].
Ajit said:
8 years ago
What is the number of critical speed for any shaft?
PRADEEP said:
8 years ago
Critical speed or whirling speed does not depend on eccentricity and deflection.
Neeraj said:
9 years ago
Span means length or geometry indication.
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