An electronic instrument of mass 20 kg is to be isolated

Question

Find the values of k₂ and m₂ in Problem 9.54 in order to have the natural frequencies of the system at least 30 percent away from the forcing frequency.

Problem 9.54

An electronic instrument of mass 20 kg is to be isolated from engine vibrations with frequencies ranging from 1000 rpm to 3000 rpm. Find the stiffness of the undamped isolator to be used to achieve a 90% isolation.