A STUDY OF DYNAMIC EFFECTS ON ICEBREAKING IN 2-DIMENSION: COMPUTATIONS AND COMPONENTS OF ICEBREAKING LOAD

This study investigates numerically, ice beam flexural failure with dynamic effects taken into account for the corresponding 2- dimensional experiment presented in another paper (see the previous abstract). The dynamic effects considered are water flooding on the ice, mass force of the ice, added mass force of the ice, and the steady water pressure increase due to ship advance. A boundary element method is used to compute steady and unsteady water pressure under the ice beam. Added mass of the ice is calculated from the unsteady pressure. Then the dynamic behaviour of the ice beam is computed by a discrete element method taking into account ice mass, added mass, steady water pressure and water on the ice. The results show that conventional analysis with ventilation on the ice yields completely different results from the experiments and the computations with dynamic effects agree with the experiment. It is also clarified that the added mass, unsteady pressure, is the most significant. The effects of water on the ice is also very important since it changes the deflection curve of the ice, resulting in the significant different of the icebreaking force.

  • 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-11, p 4447 [6 p, 14 ref, 8 fig]
  • Authors:
    • Yamaguchi, H
    • Usami, A
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00728290
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM