Figure Bl The geometry and nomenclature for a slack cable of length L and mass per unit length m. 



X =3bTr 



t ' t + I t I + 



(n = l) (n=2) (n=3) (n=4) (n=5) (n=6) (n = 7) 



Figure B2 Graphical solutions lo equation (89) for the lowest symmetric-mode natural frequencies of a flat-sag cable. The 

 effects of cable sag and extension are included in the parameter \^ (see equation (B4)). For K^ = °o i e cable is inextensible, 

 and for A. 2 = the cable is taut. 



133 



