What Is the Design Principles of Machine Foundation?

Design Principles:

The general principles of machine foundation design are as follows:

1. It should be isolated from the adjoining parts of the building by leaving a gap around it to avoid the transmission of vibrations. The gap is filled with suitable insulators or dampers.

2. The foundation should be stiff and rigid to avoid possibilities of tilt in it.

3. In static state, the resultant of forces acting on the machine foundation should pass through the c.g of the contact area of the base.

4. The weight of the foundation block should be adequate. It should be able to absorb vibrations and resist resonance between adjoining soil and the machine. The weight of the foundation block may be assumed roughly 2.5 times the weight of the machine.

5. A vibration absorbing medium is introduced between the bottom of the foundation block and the floor on which it is resting. This medium may be in form of a rubber or leather gasket, layer of sawdust, etc.

Sometimes, springs are used below the machine itself to prevent the development of the vibrations. It is advised that relevant data of machine should be obtained from the manufacturer before any design of foundation is undertaken.