Global Ice Forces and Ship Response to Ice

• Main Authors: Minnick, P., St John, J., Cowper, B., Edgecombe, M.
• Other Authors: ARCTEC INC COLUMBIA MD
• Format: Text
• Language: English
• Published: 1990
• Subjects: Snow; Ice and Permafrost; Marine Engineering; *VELOCITY; GLOBAL; SHIPS; IMPACT; ACCELERATION; IMPACT TESTS; LOADS(FORCES); COMPARISON; BENDING; TIME; ICE; RESPONSE; HISTORY; PRESSURE; STRAIN GAGES; BENDING MOMENTS; LONGITUDE; RIDGES; BEAUFORT SEA; MEASUREMENT; *ICEBREAKERS; *SEA ICE; ICE LOADS; SHIP HULLS.; Beaufort Sea; Ice; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA231529; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA231529

During September and October of 1985 the Polar Sea conducted ice impact tests on heavily ridged ice features in the Alaskan portion of the Beaufort Sea. Bending strain gage measurements were used to estimate the longitude bending moment distribution of the Polar Sea during impacts with ice pressure ridges. Compressive strains along the stem and ship acceleration and velocity measurements were also recorded. This paper describes the methodology for determining the global ice impact force from the measurements and presents the results of these tests. A comparison of the results with other available data is also presented. A comparison of the results with other available data is also presented. Hull strain, and impact force time histories are presented along with the longitude bending and shear distributions during ice impact events. The results indicate that the methodology used in estimating the impact force provided an excellent understanding of ship-ice interaction.