Sahveiber 3 Bentkowsky and Kerr 



Into a 1 knot current and mating on the forward hatch, was 690 lbs 

 well within the thruster forces available. Furthermore, during 

 mating, the operational procedure will be to head the DSRV, within 

 practical limits, into the actual flow (the resultant of the current and 

 the cross -flow due to deflected flow off the sail). This operation 

 will result in a reduction to the side force to a much lower force 

 level. 



INCLUSION IN THE MATHEMATICAL MODEL 



Attenapts to mathematically simulate the interaction forces 

 by using the potential solution of flow around a cylinder on a plane to 

 generate the flow field were unsuccessful in the time available. In 

 addition, not enough submarine -cur rent configurations were tested 

 to verify superposition techniques. 



The parameters Cxn and K of the previously mentioned 

 Interaction terms were apporlxmiated In the simulation by two-slope 

 nonlinear Itles. Figure 23 shows the two slope approximations of the 



2. Or 



1.5 



1.0 



0.5 







-0.5"- 



-3. Or 

 2.5 

 2.0 

 1.5|- 

 1.0 

 0.5 

 



5'*^0 15 20 25 30 35 

 Z^ (FEET) — ^ 



FORWARD HATCH 



DISSUB 



ROLL ANGLE: O 



DISSUB 



HEADING: 90" 



10 15 20 25 30 35 

 Z.(FEET)— ^ 



5 10 15 20 25 30 35 

 Zj(FEET)— ► 



^— Zj (FEET) 



Fig. 23. Interaction Force Parameters 



1164 



