It is a remarkable engineering discovery and invention that vibration mounts exist. A vibration mount must be strong enough to carry the loads in question. Such loads can be massive, as in bridges and large ship motors and engines.
The main objective of anti-vibration mounts is to separate the vibration of one unit from the rest of the system. The reason could be human comfort and noise reduction, but mainly to stop forces from being conveyed to other components that are not designed to take repetitive stresses, like concrete floors. The material's strength under repetitive forces is much lower than under static forces, and the failure rate rises with frequency in a nonlinear manner. A rare but possible reason is that the energy in different parts can affect the natural frequency of each other, causing a remarkable increase in the vibration amplitude and quickening fracture.
Heavy machinery installations utilize anti-vibration mounts to prevent the transfer of vibrations to the installation surface, which could cause noise or damage depending on the installation conditions.
The Principle of Anti-Vibration Mountings
Anti-vibration mountings minimize the level of vibration conveyed from an oscillatory system to its surrounding surfaces. Alternatively, the mounts can be used to safeguard fragile gear from external vibrations. Typically, mountings should be chosen to deliver at least 70% isolation, i.e., not more than 30% transmission, against the lowest frequency of the system. For instance, specific rubber-to-metal bonded mountings can also be utilized to prevent shocks.
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