Values for the coefficient K determined from the NCEL test data are 

 shown in Table 1." Since there is not a sufficient amount of data to 

 determine how K varies with the wave parameters the average value of 

 0.17 is used. 



Table 1. Values of coefficient K - NCEL data. 



L(ft) 



H(ft) 



H/L 



AF(lbs) 



Fcyl(lbs) 



K 



30 



0.90 



0.030 



1.3 



5.5 



0.24 



20 



0.76 



0.038 



1.0 



6.1 



0.16 



20 



0.63 



0.032 



0.7 



5.2 



0.14 



12 



0.49 



0.041 



0.6 



4.7 



0.13 



Average K = 0.17 



H = Wave Height 

 L = Wave Length 



Experimental data for wave forces on flat plate and cylindrical 

 piles reported in reference 2 can be correlated with the data in 

 Table 1 with fairly good agreement. The wave force in the direction of 

 the concave side of the hydrodynamic form can be approximated by the 

 wave force on a flat plate of the same length and width. Similarly, 

 the wave force in the direction of the convex side of the form can be 

 approximated by the force on a circular cylinder. With these assumptions, 

 values for the coefficient K obtained from reference 2 are shown in 

 Table 2. Breaking wave data which is given in the reference was omitted 

 since the wave steepness ratios for the NCEL data were considerably 

 below breaking wave values. The reference 2 data correlates well with 

 the NCEL data. 



Table 2. Values of coefficient K - Morison data (ref. 2). 



L(ft) 



H(ft) 



H/L 



K 



0.681 

 0.342 



0.0803 

 0.0884 



0.280 

 0.170 



The data of Table 1 is obtained from Table 3 of Part I. Since AF 

 involves differences of measured forces, small data values are not 

 included to improve accuracy. The values of Fj,y]^ are the averages of 

 the data from the three series of tests. 



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