a small industrial washing machine with a mass of 30kg is mounted on a
A small industrial washing machine with a mass of 30kg is mounted on a spring. The product design specification states that the machine must have an undamped natural frequency of 3Hz. A viscous damper system is also attached to the machine which resists the motion with a force proportional to velocity equal to 1.3kN when the velocity is 2m/s.
i) required stiffness of the spring in the machine
ii) damping ratio
iii) damped natural frequency
iv) damped time period
v) the equation of motion
If the machine is given an initial displacement of 20mm and then allowed to decay.
vi) the displacement after 1 second.
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