This chart illustrates the theoretical relationship between isolation efficiency, disturbing frequency and static deflection(or dynamic natural frequency) for a simple isolation system on a rigid foundation. It is also grouped into zones suggesting isolation efficiency ranges appropriate to different applications. To use the chart, determine the lowest rotation speed of the equipment and consider this to be the disturbing frequency. Move vertically to intersect the diagonal line corresponding to the percentage isolation required; then move horizontally left and read the dynamic natural frequency or static deflection required of the mounting.It is sufficient to use static deflection to select the correct isolator for spring mounted systems; but for rubber and pad mounts, selection should be made on the basis of dynamic natural frequency.

---------Resonance

_____Isolation Efficiency