Numerical - Natural frequency of damped vibration, given damping factor

Q.  Calculate natural frequency of damped vibration, if damping factor is 0.52 and natural frequency of the system is 30 rad/sec which consists of machine supported on springs and dashpots.
- Published on 11 Sep 15

a. 25.62 rad/sec
b. 20.78 rad/sec
c. 14.4 rad/sec
d. 15.33 rad/sec

ANSWER: 25.62 rad/sec


  • Ahmed Ur Rehman Khan   -Posted on 08 Jan 18
    Wn' = Wn x sqrt(1^2 - D.F^2)
    Wn' = 30 x sqrt(1^2 - 0.52^2)
    Wn' = 25.62 rad/sec
  • P.ASHOK KUMAR   -Posted on 14 Sep 16
    some of the problematic questions are not giving the explanation . please sent the detailed solutions

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