Dern 



NOMENCLATURE 



C Coefficient of drag appearing in Morison's formula 



C Coefficient of added mass appearing in Morison's 



formula 



C^ Vertical prismatic coefficient — - — _ ; . 



P p H S (o) 



H Buoy draft 



H (i cr , a) Describing function 



H <> (2TTl|) Transfer function of relative motion 



H Significant wave height 



v 



H (2TT Li?) Transfer function of pitching motion 

 9/ 



I Moment of inertia of buoy in roll about the center of 



xx 



gravity 



I Moment of inertia of buoy in pitch about the center of 



yy 



gravity 



J Added moment of inertia of buoy in roll about the 



xx 



center of gravity 



J Added moment of inertia of buoy in pitch about the 



yy 



center of gravity 

 K Radius of gyration in pitch 



yy 



L Overall length 



rl 1 



N Damping coefficient in heave 



zz 



N Damping coefficient in pitch 



N p<p Damping coefficient in roll 



O x y z _. 



o o o o Fixed coordinate system 



O x y z Body coordinate system 



P = _?_/* H ( zG - z) n S(z)dz 



n m / 



^ o 



r H -kz 



Q (k) = -£-/ (zG - z) n S(z)dz 



n m / 



•/ o 



R Buoy radius 



1076 



