A MODEL TO PREDICT HULL-ICE IMPACT LOADS IN THE ST. LAWRENCE

Channel deepening operations in the St. Lawrence River now make it possible for tankers in excess of 100,000 deadweight tons to call at Quebec City area refineries. Due to the increase in traffic and vessel size expected with this new channel, the Canadian Ministry of Transport has started a program to assess danger to ships due to ice conditions in the St. Lawrence River. This paper presents a study of St. Lawrence River and Gulf ice conditions with a mathematical model that predicts ice impact loads on ships under these conditions. For this prediction, the first step in the assessment program, the model was computerized and exercised. Model results obtained are compared to previous full-scale test results and agree favourably. Finally, predictions are presented for the ice loading on a typical VLCC in St. Lawrence ice. The model shows that ice impact actually causes greater pressures to be exerted on much more limited areas, than does the traditional hydrostatic approach to design loading.

  • Supplemental Notes:
    • Presented at the Ice Tech Symposium, Montreal, Canada, April 9-11, 1975.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Major, R A
    • Berenger, D M
    • Lawrie, CJR
  • Publication Date: 1975-4

Media Info

  • Features: References;
  • Pagination: 23 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095324
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: May 29 1975 12:00AM