Analysis of Ship-Side Wave Profiles 



III. MODELS AND WAVE PROFILE MEASUREMENT 



Among a variety of hull form characteristics, the beam- 

 length ratio (B/L) is supposed as the leading parameter for the shel- 

 tering effect. 



Therefore a set of two Inuid models M 20(B/L = 0. 0746) 

 and M 21(B/L = 0. 1184) are prepared as shown in Table 2 and Fi- 

 gures 5 ~ 6 . 



The hull generating sources m( £ ) of M 20 and M 21 

 are optimized to give the minimum wave resistance at the speed of 

 K^L = 12(Fn = 0.2887) under the following restraints: 



I 0. 018(M 20) 



> ) (13; 



0. 036(M 21) 



and 



Kf) = £ a i r (i= 1/ 3. 5) 



Three kinds of tank experiments, i. e. (a) towing test, 

 (b) wave-profile measurement, and (c) wave pattern measurement, 

 are carried out with M 20 and M 21 for the speed of K Q L = 7 ~ 20 

 (Fn = 0.3780 ~ 0. 2236). 



As the typical examples, the results of the wave-profile 

 measurement at the speed of K Q L =8, 12 and 16 are reproduced 

 here in Figures 7 ~ 9 , where the two kinds of calculation, (a) from 

 the hull -gene rating source m( £ ) , and (b) from the wave -analyzed 

 source m( £ ), are also presented by dotted lines and by plots, res- 

 pectively. 



IV. ANALYSIS OF MEASURED WAVE PROFILES 



The proposed method of analysis is applied to the'measured 



691 



