S = 2-0 



Cm = '-5 

 The cable parameters chosen are 



L = 20,000 ft 



max 



w = 0. 90 lb/ft 



S E = 240, 000 lb 

 SIj = 10,000 lb 



/EN^/2 1/2 



^= (-^) = {^) = 2, 930 ft/sec 



4CdPA 



and, therefore, ^=0.50|Uq|. 



The cable data used herein was obtained from the August 1964 "Braided Rope 

 and Cordage Catalog" of the Samson Cordage Works, Boston, Mass. It is now 

 convenient to select cable lengths such that values of ^l, where fi = wL/M , 

 coincide with those used in deriving the curves presented previously in the results. 

 These values are given in Table IIU 



Table III. Cable Lengths Used in Design Example for 

 Polypropylene Cable 



L (ft) M c/L 





— 





16,660 



1.00 



0.1758 



8,330 



0.50 



0.3516 



1,660 



0.10 



1 . 7580 



833 



0.05 



3.5160 



166 



0.01 



17.5800 



It is now possible to set up Table IV corresponding to Table II given in the 

 proposed design procedure by specifying that input amplitudes of oscillation, |Uq|, 

 of 1.0, 2.0, 6.0, 10.0, and 14.0 feet will be considered. Knowing that jS = k |Uq|, 

 Column 2 of Table IV may be calculated. The values of l^^gxl ~ ^^d/l'-'ol ^ ^*^" 

 be derived for appropriate values of L and IUqI as shown in Column 3 of the table. 



12 



