L £ 

 B ' H 



D YBD 



d ' mg 



wave structure parameters 



= fluid structure parameters 



(!)(=? 



-^— J = Reynold's number 



Delete the following parameters for the stated reasons: 



ke 

 mg 



YBD 

 mg 



Only quasi-two-dimensional experiments will be 

 considered (i.e., diffraction effects are 

 absent when the breakwater extends across the 

 full width of the tank) . 



This is the ratio of mooring-system static 

 restoring force to structure weight and is not 

 changed during the experiment. 



Assumed to be a weak parameter that is of 

 little importance for small values of e/H 

 (i.e., for horizontal motions of the structure 

 that are small compared to the wave height) . 



This parameter relates the mass of fluid dis- 

 placed by the breakwater to the mass of the 

 breakwater itself. It would remain constant 

 for geometrically similar breakwaters con- 

 structed from the same materials. 



mm 



This Reynold's number is based on the tire 

 diameter and a velocity that is related to the 

 maximum wave-induced water particle velocity; 

 it will be assumed large enough to insure 

 Reynold's number independence. 



By eliminating the above dimensionless groups, the following is obtained 



/L H D B\ 

 C t - f (-,-,- , -) (4) 



Z \B L d D/ 



33 



