A foundation block is to be installed in a plant such that the vibration from the adjacent areas will not affect it. The mass of the foundation system is 3000 kg, and the surrounding floor vibrates at...

A foundation block is to be installed in a plant such that the vibration from the adjacent areas will not affect it. The mass of the foundation system is 3000 kg, and the surrounding floor vibrates at 2500 cycles per minute. Estimate the stiffness of the foundation so that the transmissibility ratio is not more than 5%, if

(a)Damping is ignored and

(b)Damping is taken as 20%.