SahreibeVj Bentkowsky and Kerr 



III. SIMUI-ATION OF DSRV/SUB MARINE INTERACTION FORCES 



There are two forms of DSRV/submarlne interaction forces. 

 The first is a mechanical type of force produced when the shock miti- 

 gation system touches on the deck and transnaits a force to the DSRV« 

 The second type of force is caused by changes in the flow field cuased 

 by the bottom and the downed submarine and will be called flow inter- 

 action forces. 



SHOCK MITIGATION SYSTEM 



The shock mitigation system is primarily designed to protect 

 the transfer skirt and absorb shocks in the event of obstacle collision, 

 A secondary purpose is to act as a retractable base from which the 

 transfer skirt may be slowly lowered to contact the hatch mating 

 surface. 



The shock system consists of a bumper ring concentric about 

 the transfer skirt (see Fig. 10). The ring is attached to eight struts 

 extending frona four points on the outer hull. Each strut has a hy- 

 draulic piston/cylinder arrangement designed to attenuate Impacts, 

 as well as extend and retract upon command. 



A simplified model of the shock mitigation system Is pre- 

 sented for purposes of simulating near normal Impacts during the 

 controlled docking event. Figure 11 Illustrates the DSRV with four 

 vertical legs extending down from the four hardpolnts on the outer 



FULLY 

 RETRACTED 



\ 



FULLY / 



EXTENDED^ 





^ 



Fig. 10. Shock Mitigation System 



1146 



