SURFACING SUBMARINE THROUGH ICE

• Main Author: ASSUR,A.
• Other Authors: ARMY RESEARCH OFFICE WASHINGTON D C
• Format: Text
• Language: English
• Published: 1962
• Subjects: *ICE; *SUBMARINES; HYDRODYNAMICS; LOW TEMPERATURE RESEARCH; MATHEMATICAL ANALYSIS; NAVIGATION; POLAR REGIONS; STRESSES; THEORY; THICKNESS; Ice Sheet
• Online Access: http://www.dtic.mil/docs/citations/AD0286658; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0286658

A theoretical analysis is presented of the problem of surfacing a submarine through ice. Two criteria are derived, one for the condition when submarine cannot possibly surface. This is when the buoyancy force is just sufficient to produce a first crack in the ice sheet. The other is the condition when breakthrough can be acc mplished. Breakthrough tests performed by CRREL with loads from above show the range between such criteria. Another consideration is whether the submarine applies a force topping at rest against the iiiiiiiiiiiiiiiiiiiiiiiiiiiii or whether it approaches the ice sheet with a vertical velocity. In the first case the force required under static loading is computed, in the second case the energy required to penetrate under impact load. Criteria are derived both from t e elastic theory and for plastic failure on the basis of collapse mechanics. (Author)