Variational Approaches to Steady Ship Wave Problems 



(b) 



L ^ L 



L: SUFFICIENTLY 

 LARGE DISTANCE 



where 



and 



Fig, 2« Riabouchinsky Models 



P = Pp + Pg , 



Ps= - J j ^(^v + i^J ds. 



'■-hii 



(3.19) 



(3.20) 



^(<l>xx + g*z) dS. (3.21) 



Accordingly, if we set 



<t>xx + g<|>2 =0 on F, (3. 22) 



which is just the dynamic boundary condition, then 



Pp=0, (3.23) 



and we are left with a variational calculus problem for P- , 



555 



