Table B-7. Heave Response of FORDS Under Varying Draft Conditions 



Condition 



Sea State 



Heading 



Heave 

 (ft) 



1 



41 



head 



2.50 







beam 



4.09 



1 



6^ 



head 



4.56 







beam 



6.08 



2 



6 



head 



0.51 







beam 



0.56 







oblique 



0.35 



'"Average wave height = 4.4 feet. Period of maximum energy 



is 9.1 seconds. 

 ^Average wave height = 8.5 feet. Period of maximum energy 



is 9.4 seconds. 



Table B-8. Dynamic Force in Pipe String Suspended from FORDS 



(Load weighs 600 tons, has a cross-sectional area of 300 ft^ , and is suspended 

 3,000 feet below the surface vessel. Pipe weighs 81 lb/ft. (With respect to 

 dynamic loading, this is the worst case.)) 



Condition 



Sea State 



Heading 



Force 

 (lb) 



1 



4 



head 



1 00,000 







beam 



1 56,000 



1 



6 



head 



186,000 







beam 



242,000 



2 



6 



head 



20,000 







beam 



20,000 







oblique 



14,000 



135 



