40 



NOTE 



30 



o 



o 

 a: 



Z) 



CO 



20- 



10- 



5- 



VERTICAL LEADERS REPRESENT SHARP 

 FREQUENCY CHANGES OVER A SMALL 

 VELOCITY CHANGE. CORRESPONDING 

 AMPLITUDE CHACTERISTICS ARE SHOWN 

 BY THE LOWER CURVE. 



n = 2fL\/^ 



T 



0.4 0.6 0.8 1.0 



INCIDENT VELOCITY, v/kNOTS 



1.2 



Figure 3.2 Vortex-excited strumming vibrations of a taut marine cable. Conditions 

 as in Fig. 3.1 except L = 1.8 m. 



30 



UJ 



o 



3 



20 q! 

 < 

 < 



10 



CD 

 <0 



L4 



66 



