Based on an operating frequency of 3.18 cps or 191 cpm, the above amplitude of 0.27mm
or 0.011 in. would fall in the ‘‘troublesome range’’ in Figure 3.20.
3.5.2 Rocking Oscillations
The motion of a rigid foundation subjected to a steady-state constant amplitude harmonic
rocking moment about the y-axis can be written as (Hall, 1967) (Figure 3.24)