EVALUATION OF BOTTOM BREAKOUT REDUCTION METHODS
Breakout forces present problems in making retrieval lifts by increasing the lift force requirement, creating a dynamic snap-load in the lifting line, and causing control difficulty during ascent. Three breakout reduction methods are tested using small submersible-sized objects. These methods are: mud suction tubes, water flooding, and air jetting. The results showed that all methods were effective at reducing the breakout force to less than 10% of the wet weight of the object. Diver handling techniques are evaluated and described. Also, a review of three methods which calculate breakout forces is presented.
Naval Civil Engineering LaboratoryPort Hueneme, CA USA
- Vaudrey, K D
- Publication Date: 1972-4
- Pagination: 29 p.
- TRT Terms: Force; Loading and unloading; Salvage
- Old TRIS Terms: Breakout forces; Snap loading
- Subject Areas: Environment; Marine Transportation;
- Accession Number: 00035666
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: NCEL-TN-1227 Final Rp
- Files: TRIS
- Created Date: Oct 27 1972 12:00AM