Dynamic Stiffness Testing of Neoprene Mountings

Neoprene mountings are primarily used for vibration isolation of mechanical equipment and floating floor constructions. The composition of a neoprene mounting has a direct influence on its ability to reduce vibration transmission and attain a specific natural frequency for vibration isolation. The standard characteristic of static loading is not the only parameter for selecting a neoprene mounting. Dynamic stiffness [static deflection/dynamic deflection] is more useful. We have tested two sets of neoprene mountings—30, 40, 50, 60, and 70 durometer each. The results of our tests indicated that the amount of carbon black and the chemical composition of the neoprene had a direct bearing on the change in the dynamic stiffness.