ALTERNATIVE ARRANGEMENTS

Low Frequency Shock & Vibration for active and passive applications.

Fig. 14.1
In the case of spring and air mounts it is advisable to have an access gap around the foundation for maintenance reasons.

Fig. 14.2 a/b
Where a machine has a high center of gravity it is usually desirable to keep the centre of gravity as low as possible to avoid instability of both machine and foundation.

For this reason a stepped foundation block can be employed. By reducing the vertical distance between the anti vibration mount and the combined machine/foundation centre of gravity the stability of the entire system is dramatically increased.

Fig. 14.4
Where forging hammers and other such shock creating machinery is used it is advisable to put vibration isolation systems both directly under the machine and beneath the foundation block.

This has the effect of minimising the shock wave that is transmitted through the surrounding floor, thus reducing noise and structure borne vibration.