Page 178 - Pipelines and Risers
P. 178
Force Model and Wave Fatigue 151
The generalized equation of motion then becomes:
d'Z (I) dZ (r)
M.-+Cn-+K.Z.(t)=Fs(t) for n=l, ..., m
dt- dr
- The Transfer Function between Wave Forces and DisDlacements
Using short-term wave conditions, the forcing function spectrum is given by:
S,(f) = KD2K,,2SI,"(f)+ K,zS,(f,
where Muansfe&) is the transfer function between wave forces and displacement response,
which is given by:
