







t 





od/s 



3 



12 



16 



40 

























/V 



^^ 



^ 



^2 Knots 











1 



/ 



\ 

 \ 



\\ 



^3 knots 



^ 





1 



/ 





^ 



~\ 





} 





// 









\ 

 \4 Knots 





1 



1 



\ 



// 















1 



\ 



/ 















1 



\t 

















1 

 1 



















1/ 



4 



















1 

















^1 

















-200 



[l 

















Figure 12a - The Variation of dco with Frequency 









^036 











^' 













h-.o.. 





u) Circular Frequency 

 7 Froude Number 

 L Ship Lengtti 

 B Ship Breodth 

 A Displacement 



— 



jr 







1 







l—j^ = 0.27 

















' 





































.—7 = 0.36 



































































































> 









4 



^H 



Figure 12b - The Variation of d with Frequency 



Figure 12 - The Variation of the Coefficient d with Frequency 



[H-. 



\ 



f Froude Number 













j 1 







B Ship Breodth 

 A Displocement 

 a> Circulor Frequency 









1 



J^ = 0.36 













/ 











\ 



















/ 























































/ 





' J! =0.27 























/ 



/ 

























/ 



/ 



/ 

























/ 



/ 













1 













/ 





/ 





/ 









J 













/ 



/ 







/=0.I8 

















/ 



/ 







/ 













n 







/ 





/ 





/ 



' 













1 







/ 



/ 







/ 













A 



i 





/ 



/ 







.'' 

















li 



/ 



/ 





, 







>=0.09 



' 











V 



/ 



/ 





,' 









/ 



.?=036 



^=027 Hovelock 



>=ai8^°'^"°"^ 





V 







,'' 









y 





\''~ 



^ 











^ 





— 





\ 





y 





^^^ 





'' 





Jl=C 



.09 



r.--- 



/ 



^- 



.-_ 



._. 



... 





















1 















Figure 13 - The Variation of the Coefficient e with Frequency 



16 



