A New Appraisal of Strip Theory 



xq - longitudinal coordinate of center of gravity relative to body axes 



X = longitudinal component of hydrodynamic force on body 



Y = lateral component of hydrodynamic force on body 



y^ = transverse body axis or coordinate of a point relative to body 

 axes 



Vq = transverse coordinate of center of gravity relative to body axes 



y = transverse body axis or coordinate of a point relative to body 

 axes 



z = normal body axis or coordinate of a point relative to body axes 



Zq = fixed vertical axis or vertical coordinate of a point relative to 

 fixed axes 



zq = vertical coordinate of center of gravity relative to body axes 



z = heavily velocity of ship or model 



z = heaving acceleration of ship or model 



Zq = amplitude of heaving motion (for Figs. 2-65) 



Z = vertical component of hydrodynamic force on body 



Zg = wave exciting heaving force 



z^ = amplitude of wave exciting heaving force 



Greek Letters 



s = non-dimensional frequency parameter 



s* - heaving phase angle (lag) after wave 



A = displacement of ship or model 



e* = pitching phase angle (lag) after wave 



= pitch angle 



^o = amplitude of pitching motion (for Figs. 2-65) 



k = wavelength 



p = water density 



351 



