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Isolated Foundations
Isolated foundations are used to provide effective, low frequency isolation of machinery and equipment. They are used extensively in industrial applications either as Active Isolation to prevent noisy, vibration emitting equipment (power presses, printing presses etc) from disturbing their surroundings or as Passive Isolation to prevent sensitive equipment (body co-ordinate measuring machines, dynamometers etc) from being disturbed by structureborne vibration.
Reasons for using isolated foundations
- Increasing machine frame stiffness to maintain alignment during changes in applied static and dynamic loads.
- Minimising changes in level due to alterations in static load distribution.
- Increasing inertia mass of the machine and reducing vibration through mass damping.
- Inertia blocks are usually 3 to 5 times the mass of the machine.
- Lowering the centre of gravity to improve stability.
- Distributing static and dynamic loads over a greater ground area.
- Isolating low frequency of shock and vibration using more elastic vibration isolators than could be used between machine and foundation.
- Low frequency disturbing vibration requires low frequency, high deflection vibration isolators. On machinery requiring low operating motion amplitudes an isolated foundation is essential if low frequency vibration isolation is required.
Farrat Isolevel Ltd.