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| 浮冰尺寸对上浮破冰过程中结构冰载荷影响的离散元分析 |
| Analysis of influence of ice floe size on ice load on structure surfacing and icebreaking based on discrete element method |
| 投稿时间：2025-04-07 修订日期：2025-05-15 |
| DOI： |
| 中文关键词: 上浮破冰 离散元方法 冰载荷 浮冰尺寸 |
| 英文关键词:surfacing and icebreaking discrete element method ice load ice floe size |
| 基金项目:国家重点研发计划(2024YFC2816403)；国家自然科学基金(42176241、52192693、52101300)资助项目 |
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| 中文摘要: |
| 结构物在碎冰区上浮过程中承受的冰载荷是关乎其结构设计和安全性能的重要因素,而冰块尺寸对冰载荷影响较大。本文采用离散元方法对结构物在碎冰区的上浮破冰过程进行了数值模拟。碎冰由球形颗粒单元黏结而成,同时考虑海水浮力和拖曳力的作用,建立了结构物上浮破冰的计算模型并分析了浮冰尺寸对冰载荷的影响规律。通过引入无量纲参数相对浮冰尺寸,讨论了冰厚和上浮速度对冰载荷随相对浮冰尺寸变化规律的影响,确定了不同冰厚和和上浮速度下碎冰向平整冰转化的临界尺寸。本文工作可为结构物上浮破冰的安全分析和抗冰设计提供参考依据。 |
| 英文摘要: |
| The ice load on structure surfacing in broken ice filed is a critical factor influencing structural design and safety performance and significantly affected by the ice floe size. In this paper, the discrete element method (DEM) is used to numerically simulate the surfacing and icebreaking process of structure in broken ice filed. The broken ice is constructed with bonded spherical particle elements under the buoyancy and drag force of current. A computational model for surfacing and ice-breaking of structure is established to analyze the influence of ice floe size on ice load. The relative ice floe size, a dimensionless parameter, is introduced to investigate the effect of ice thickness and surfacing speed on variation pattern of ice load with relative ice floe size. The critical relative size of transformation from broken ice to level ice under different ice thicknesses and surfacing speeds is determined. This work can provide reference for safety analysis and ice-resistant design of structures surfacing and icebreaking. |
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