Maurice Tutor

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Category > Computer Science Posted 27 Aug 2017 My Price 9.00

natural frequency

A body weighs 135 N. A spring and a dashpot are attached to the body in the manner shown in Figure 2.2b. The spring constant is 2600 N/m. The dashpot has a resistance of 0.7 N at a velocity of 60 mm/s. Determine the following for free vibration:

a. Damped natural frequency of the system

b. Damping ratio

c. Ratio of successive amplitudes of the body (Zn/Zn + 1)

d. Amplitude of the body 5 cycles after it is disturbed, assuming that at time t = 0, z = 25 mm

 

 

Q10;

A machine foundation can be identified as a mass-spring system. This is subjected to a forced vibration. The vibrating force is expressed as

Weight of machine + foundation = 290 kN

 Spring constant = 875 MN/m

Determine the maximum and minimum force transmitted to the subgrade.

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Maurice Tutor
(5)
Status NEW Posted 27 Aug 2017 09:08 PM My Price 9.00

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