r>,^^ 



r o •- 



-LOWEST SYMMETRIC 



MODE 





X 



D- 



-LOWEST ANTISYMMETRIC MODE 





c 



— 









M- 









D 



>^ 







D 





^10 



— 





n 





Ld 



~ 





l—M 



D 





Z) 



— 



r 







o 



LU 



• 



• ^1 % 





O 



cr 



— 



O 





< 



D 









cc 





XI ' X 







3 





OJI 1 h- 







h- 



_ 



M 1 II 







< 





<l < 









1 



LUI 1 lU 



1 1 ll 1 1 1 11 1 



1 1 1 



1 1 1 1 1 1 



'20 



50 100 200 500 



TENSION, H/POUNDS 



1000 



Figure B4 The measured natural frequencies /^ of a Double Armor Steel cable in air. Cable diameter = 5/8 in. (1.59 cm). 



(lib = 4.45 N) 



135 



