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Date of Publication:2022-10-04

Journal:Chuan Bo Li Xue/Journal of Ship Mechanics

Affiliation of Author(s):运载工程与力学学部

Volume:25

Issue:4

Page Number:453-461

ISSN No.:1007-7294

Abstract:Distribution characteristics of ice pressure on ship hull are important auxiliary information for structural safety early-warning and ice load monitoring of ice-going ships. In this paper, the Discrete Element Method (DEM) based on GPU (Graphics Processing Unit) parallel and bond-break model is developed to simulate the breaking process of level ice under different ice conditions, and the distribution of ice pressure on the ship hull can be obtained. In the calculation of ice pressure, considering the cumulative effect on time, i.e. the cumulative maximum and cumulative average values, the dangerous area of ice pressure on the ship hull and the distribution characteristics of ice pressure are analyzed from different viewpoints. The global ice loads and local ice pressure on ship hull during ship navigation are analyzed in DEM simulations. In order to verify the reliability of this method in the analysis of ice pressure on ship hull structure, the free collision process between ship hull structure and large ice floe is simulated while the ice pressures at the collision positions are analyzed and compared with the ice load code of IACS (International Association of Classification Societies). The results show that the error between the DEM results and the IACS code is from 6.7% to 18.1%. The DEM for sea ice simulation proposed in this paper provides a reliable analysis approach for the design and development for ice-going ships. The simulation result can provide reasonable assisted decision for navigation safety early-warning and ice load monitoring of ship hull in ice regions. © 2021, Editorial Board of Journal of Ship Mechanics. All right reserved.

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