A STUDY OF DYNAMIC EFFECTS ON ICEBREAKING IN 2-DIMENSION: EXPERIMENT

Most of the existing theories to predict continuous mode icebreaking resistance of ships assume that the force to break an ice sheet is not affected by the ship velocity but determined only by the mechanical properties of the ice. However, it is presumed that the icebreaking force increases with the ship velocity, for example, because of the increase in pressure under the ice sheet. To examine this, a series of fundamental tests were made using 2- dimensional model ships with various stem angles and advance velocities. Ice beams were broken by these models with side plates to realize 2-dimensional flow under the ice and model. Only the icebreaking components were extracted from the force signals acting on the 2-D models. The results clearly showed that the icebreaking force increased and the size of the broken ice pieces decreased as the model velocity increased. The higher the stem angle was, the clearer this tendency was. The reason for this is discussed in another paper (see the following abstract).

• Supplemental Notes:
  • IST '95, Northern Sea Route; Future & Perspective; INSROP Symposium; 1-6 Oct 1995; Tokyo, Japan. Procs. Publ by Ship & Ocean Foundation, Japan. Ppr TSI-10, p 437 [9 p, 13 ref, 2 tab, 24 fig]
• Authors:
  • Usami, A
  • Kato, K
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Ice; Icebreaking; Resistance (Mechanics)
• Old TRIS Terms: Ice resistance
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00728289
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Nov 4 1996 12:00AM