ABSTRACT
Many industrial processes give rise to large dynamic forces. The unbalanced masses of large rotating machines generate oscillating forces, while forge hammers and rock crushers apply transient shocks and impacts. Rotating or reciprocating machines generally operate at fixed frequencies. It is essential to design the foundations or supports to avoid resonance. Periodic forcing functions will always induce dynamic responses and these should be evaluated to ensure that they do not damage the fabric of the enclosing buildings, the machines themselves or other sensitive processes nearby. The vibration due to transient shocks and impacts should also be evaluated for the same reason. Furthermore, human beings are very sensitive to vibrations and the amplitudes should not cause discomfort to personnel working nearby or to other occupants of buildings that contain machines.
