Wave Forces on a Restrained Ship tn Head-Sea Waves 
(C-8) 
iii yi? - aie 
ee 
- 
yp -k 
Here @ = . It can be shown that the integral terms in (C-8) 
are exponentially small with respect to e 
Gase li: k > k, : 
The poles of the integrand of (C-3) are now real. The 
Rayleigh viscosity mu is helping us to determine how to indent the 
integration path of I(k) around the poles. By using the residue 
theorem in the same way as for Case I, we will get a similar result 
as (C-8). In this case, however, we cannot say that the integral 
terms are exponentially small for all k. We can write 
if eVvg psy 
U fe) 
oa, es | e e are 
ars 
I(k) = 
+ exponentially small terms 
SS f 1yz S 
- a 
for pavee hs? ife! «” E(k) = poten < 
2 
a 2 wie Uk 
eat afr 2 
1821 
