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Numerical estimation of ship resistance in broken ice and investigation on the effect of floe geometry
https://orcid.org/0000-0002-3129-1731
https://orcid.org/0000-0002-6569-6286
Abstract In this paper, a numerical model based on the non-smooth discrete element method is presented to investigate the effect of ice floe shape on ship resistance under low-concentration broken ice condition where ice fields consist of relatively small and unbreakable floes. The accuracy of the numerical model is validated by the comparison with a series of experiments conducted by the authors with artificial ice floes made from polypropylene (PP) material. The mean ice resistance estimated by the numerical model is in fairly good agreement with both the experimental results and those from the existing semi-empirical formulas. Additionally, the floe shape effect captured in the experiment, i.e. “rectangle-like” floes results in higher resistance than “elliptic-like” floes, is also predicted by the numerical model. Then, the validated numerical model is used to further investigate the effect of floe shape on ship resistance. It has been found that the rectangle floe results in higher ice resistance than other studied floe shapes. The ratio between the maximum and minimum caliper diameters of floe shows little influence on the ice resistance of ship. Finally, the effect of ice thickness on the ice resistance is also discussed.
Highlights A non-smooth discrete element method-based model is presented for ship resistance prediction in broken ice. An ice field generation method is proposed, which can consider the requirements of floe size and shape. The validity of the model has been proved by the comparison with both experiment and semi-empirical formulas. The study discovered and explained that rectangle-like and thick floe induces wider affected region than others. The effect of floe shape on resistance is captured from both experiment and numerical simulation.
Numerical estimation of ship resistance in broken ice and investigation on the effect of floe geometry
https://orcid.org/0000-0002-3129-1731
https://orcid.org/0000-0002-6569-6286
Abstract In this paper, a numerical model based on the non-smooth discrete element method is presented to investigate the effect of ice floe shape on ship resistance under low-concentration broken ice condition where ice fields consist of relatively small and unbreakable floes. The accuracy of the numerical model is validated by the comparison with a series of experiments conducted by the authors with artificial ice floes made from polypropylene (PP) material. The mean ice resistance estimated by the numerical model is in fairly good agreement with both the experimental results and those from the existing semi-empirical formulas. Additionally, the floe shape effect captured in the experiment, i.e. “rectangle-like” floes results in higher resistance than “elliptic-like” floes, is also predicted by the numerical model. Then, the validated numerical model is used to further investigate the effect of floe shape on ship resistance. It has been found that the rectangle floe results in higher ice resistance than other studied floe shapes. The ratio between the maximum and minimum caliper diameters of floe shows little influence on the ice resistance of ship. Finally, the effect of ice thickness on the ice resistance is also discussed.
Highlights A non-smooth discrete element method-based model is presented for ship resistance prediction in broken ice. An ice field generation method is proposed, which can consider the requirements of floe size and shape. The validity of the model has been proved by the comparison with both experiment and semi-empirical formulas. The study discovered and explained that rectangle-like and thick floe induces wider affected region than others. The effect of floe shape on resistance is captured from both experiment and numerical simulation.
Numerical estimation of ship resistance in broken ice and investigation on the effect of floe geometry
https://orcid.org/0000-0002-3129-1731
https://orcid.org/0000-0002-6569-6286
Abstract In this paper, a numerical model based on the non-smooth discrete element method is presented to investigate the effect of ice floe shape on ship resistance under low-concentration broken ice condition where ice fields consist of relatively small and unbreakable floes. The accuracy of the numerical model is validated by the comparison with a series of experiments conducted by the authors with artificial ice floes made from polypropylene (PP) material. The mean ice resistance estimated by the numerical model is in fairly good agreement with both the experimental results and those from the existing semi-empirical formulas. Additionally, the floe shape effect captured in the experiment, i.e. “rectangle-like” floes results in higher resistance than “elliptic-like” floes, is also predicted by the numerical model. Then, the validated numerical model is used to further investigate the effect of floe shape on ship resistance. It has been found that the rectangle floe results in higher ice resistance than other studied floe shapes. The ratio between the maximum and minimum caliper diameters of floe shows little influence on the ice resistance of ship. Finally, the effect of ice thickness on the ice resistance is also discussed.
Highlights A non-smooth discrete element method-based model is presented for ship resistance prediction in broken ice. An ice field generation method is proposed, which can consider the requirements of floe size and shape. The validity of the model has been proved by the comparison with both experiment and semi-empirical formulas. The study discovered and explained that rectangle-like and thick floe induces wider affected region than others. The effect of floe shape on resistance is captured from both experiment and numerical simulation.
Numerical estimation of ship resistance in broken ice and investigation on the effect of floe geometry
Yang, Biye (author) / Sun, Zhe (author) / Zhang, Guiyong (author) / Wang, Qingkai (author) / Zong, Zhi (author) / Li, Zhijun (author)
Marine Structures ; 75
2020-09-01
Article (Journal)
Electronic Resource
English
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