Marsich and Merega 



Table 12 

 Values for r. = l ( i = 3, 5, 7) 



Table 13 

 Final Distribution 



2.4 Weight Parameter 



A first systematic calculation, results of which have not been reported in 

 the first part of this paper, has been carried out to the aim of determining which 

 and how many parameters are necessary to characterize a weight distribution in 

 respect with their influence on wave bending moment in confused sea (highest 

 value along the hull). 



To this purpose, weight distributions 1 to 36 of Table 14 have been chosen 

 in association with a hull having: length 200 m, L/B = 7, L/i = 17.50, Cy^ = 

 0.804 and ship's speeds corresponding to Fr = o, 0.05, 0.10. 



It was found that, being Fr equal, values of coefficient c^, are uniquely cor- 

 related to values of p (as defined in part 1 of this paper) reported in the last 

 column of Table 14, although loading conditions were different. The unique re- 

 lationship between p and c^ is shown as an example in Fig. 11, for one value 

 only of Fr . From this figure it can easily be seen that the interdependence be- 

 tween the two variables may be assumed as linear. 



It is to be noted, in order to establish the limits of accuracy of the assump- 

 tion, that this relationship remains linear and unique up to Fr values not much 

 higher than 0.10. There are instead no limitations for hull dimensional 

 parameters. 



840 



