LOADS ACTING ON A SHIP AND THE ELASTIC RESPONSE OF A SHIP 



277 



0.7 



0.6 



[0.5 



0.4 



0.3 



0.2 



0,1 



20 



25 30 



Dnaft d cm 



J L. 



35 



0,03 0.04 0.05 0.06 



d/L 



Effective wave height ratio ijH, >)H' (F = 0) 



40 



25 30 



Draft d cm 



003 0.04 0.05 O06 



d/L 



Effective wave height ratio j)5, t]S' (f = 0) 



0.7 



pO-6 



05 



o 

 ■^0.4 



0.3 



.0 



& 0.2 



Lw = 600 cm 

 Hw = 20 

 Vm = 2 00 M/sec 

 F = 158 



25 30 



Draft d cm 



35 



0.03 



0.04 



Q05 



QOG 



d/L 



40 



Effective wave height ratio tjH, 17//' (f = 1.58) 

 Fig. 26(^) From Ochi, 1957 



from the ship-wave formation. The second conspicuous 

 feature is the sudden increase of the sagging bending 

 moment at 3 m/sec. At this speed the synchronism of 

 pitching motion is approached and motions become large. 

 It is probaljle that this increase of the bending moment is 

 caused by the water impact on the unusually sharp bow- 

 flare curvature at the forecastle deck. 



Quoting a part of Sato's concluding remarks: 



08 



0.7 



'O.e 



o 0.5 



X 0,4 



>0.3 

 5 



0.2 



20 



25 30 



Draft d cm 



35 



0.03 



0.04 



0.05 



QOG 



d/L 



40 



Effective wave height ratio jjS', r]S' (F = 1.58) 

 Fig. 26(A) From Ochi, 1957 



'1 In the drifting state,"" the curves of strain, pitch- 



I.e., at zero forward speed. 



