| 冰盖前缘冰块稳定性研究进展 |
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| 引用本文： | 王军,桑连升,宋飞虎,程铁杰.冰盖前缘冰块稳定性研究进展[J].水利学报,2023,54(11):1277-1286. |
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| 作者姓名： | 王军 桑连升 宋飞虎 程铁杰 |
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| 作者单位： | 合肥工业大学, 安徽 合肥 230009 |
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| 基金项目： | 国家重点研发计划项目（2022YFC3202502）；国家自然科学基金联合基金项目（U2243239） |
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| 摘 要： | 冰块在冰盖或冰塞前缘的稳定性是冰塞演变研究的重要基础，是任何预测或预报冰塞演变相关数学模型不可缺少的部分。对国内外经典的冰块下潜研究文献进行了梳理，按照研究方法的不同，冰块下潜临界条件的研究大致可分为以原型观测为主、以理论分析为主和以试验研究为主的三个方面。无论是工程应用还是理论研究，流行的下潜判断是临界弗劳德数形式。经过分析，探讨了现有相关研究的不足之处，得出以下主要结论和今后的研究方向：临界弗劳德数影响因素众多，如水流、气象和冰本身的状况，因此，其值表现出范围变化，具有特定的场所性；迄今为止的冰块下潜研究基本忽略了冰块宽度效应，直接影响了下潜力矩和抗倾覆力矩的正确表达；冰块在下潜时，其底面的压力和分布变化的研究是非常重要的，而现有的研究尚有很多需要改进。
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| 关 键 词： | 下潜 临界条件 弗劳德数 压力变化 冰块 |
| 收稿时间： | 2023/5/31 0:00:00 |
Research progress on the ice blocks stability in front of ice cover |
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| WANG Jun,SANG Liansheng,SONG Feihu,CHENG Tiejie.Research progress on the ice blocks stability in front of ice cover[J].Journal of Hydraulic Engineering,2023,54(11):1277-1286. |
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| Authors: | WANG Jun SANG Liansheng SONG Feihu CHENG Tiejie |
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| Affiliation: | Hefei University of Technology, Hefei 230009, China |
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| Abstract: | The stability of ice in the front of ice cover or ice jam is an important basis for the study of ice jam accumulation.Similarly, it is an essential part of any mathematical model predicting or forecasting ice jam accumulation.A review of the classic literature on submergence of ice blocks, both domestically and internationally, has been conducted, and the study ways on the critical conditions for ice block submergence has been roughly categorized into three aspects:prototype observation, theoretical analysis, and experimental study.Whether for engineering applications or theoretical research, the critical Froude number is commonly used to determine ice block submergence.Through analysis and discussion of the deficiencies in existing research, the following main conclusions and future research directions have been drawn:the critical Froude number is influenced by multiple factors, such as water flow, meteorology, and the condition of the ice blocks themselves, thus exhibiting a range of values with specific regional characteristics.The existing research on ice block submergence has largely overlooked the effect of ice block width, which directly affects the accurate representation of submergence moment and anti-overturning moment.The study of pressure and distribution changes on the bottom surface of ice blocks during submergence is of great importance, and there is still much room for improvement in the existing research. |
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| Keywords: | submergence critical condition Froude number pressure variation ice block |
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