A New Appraisal of Strip Theory 



g = gravitational acceleration 



g = coefficient of equation of motion 



G = moment vector of external forces 



G = coefficient of equation of motion 



G = center of gravity 



h, h(t) = instantaneous wave elevation referred to absolute system 



h(x) = instantaneous wave elevation referred to relative (moving) 

 system 



h(x) = instantaneous wave velocity referred to relative (moving) system 



h(x) = instantaneous wave acceleration referred to relative (moving) 

 system 



h^ = amplitude of sinusoidal wave (half wave-height) 



H = draft of ship or model 



Hq = angular momentum vector about g relative to fixed axes 



l^'ly'l^ = moments of inertia about x,y,z axes respectively 



K = rolling moment 



k = wave number, 2^/^ 



kg = non-dimensional longitudinal radius of gyration 



kj = high-frequency added mass coefficient of section (Lewis) 



k^ = low-frequency added mass correction factor (Grim-Porter) 



L = length of ship or model 



LCB = longitudinal distance of center of buoyancy from amidships 



LCG = longitudinal distance of center of gravity from amidships 



m = mass of ship or model 



m(x) = sectional added mass = k„ v.np 1_^ 



2 4^ 8 



M = pitching moment 

 Mg = wave exciting pitching moment 



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