Lee 



2.0 

 1.8 

 1.6 

 1.4 

 r- V2 



0.8 

 0.6 



0.4 



0.2 



1.0 1.2 1.4 1.6 1.8 2.0 X. 



Fig. 5 First- and second-order forces vs. \ for X = 2b 



1.0 



0.8 



K 



I- 



r. 0.6 



0.4 



0.2 



1.0 1.2 1.4 1.6 1.8 2.0 X. 



Fig. 6 First- and second-order forces vs. X for X| = 10b 



934 



