Chapter 4.P1, Problem 4P

The vibrations in the floor of an industrial plant lie in the range $16-75\text{hertz}\left(\text{Hz}\right)$. The combined mass of the equipment and platform is $38\text{kg}$, and the viscous damping ratio of the suspension is $0.2$. Find the maximum value of the spring stiffness if the amplitude of the transmitted vibration is to be less than $10\%$ of the amplitude of the floor vibration over the given frequency range.