SOME EXPLORATORY TESTS ON CIRCULAR AND SIDEWALL ACIB CONCEPTS

Non-dimensional parameters are proposed for model calculations of the resistance and speed of air cushion icebreaking bows (ACIBs). Data obtained from theoretical tests on circular and sidewall ACIBs indicate that resistance is independent of ice thickness and related to the air cushion pressure. Models required higher pressure ratios (cushion pressure, expressed in terms of height of a water column, over the ice thickness) to reach the breaking points of model ice than the ratio that was previously found effective with full-scale ACIBs. This higher ratio was needed probably because of the higher relative toughness of model ice, thus allowing higher deflection values (prior to rupture) than those for real ice.

• Supplemental Notes:
  • Excerpt; air cushion icebreaking bows
• Authors:
  • Colbourne, B
  • Hinchey, M J
  • Mak, L
• Publication Date: 1989-9

Media Info

• Features: References;
• Pagination: 16 p.

Subject/Index Terms

• TRT Terms: Bows; Ice; Icebreakers; Icebreaking; Mathematical models; Resistance (Mechanics); Strength of materials
• Old TRIS Terms: Air cushion; Ice resistance; Ice strength
• Subject Areas: Marine Transportation; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00660602
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM