| XU Guobin.河冰演变过程分析的一维数学模型研究Journal of Water Resources and Water Engineering[J].,2011,22(5): |
| 河冰演变过程分析的一维数学模型研究 |
| One- dimensional mathematical models of river ice evolving process |
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| DOI：10.11705/j.issn.1672-643X.2011.05.194 |
| 中文关键词: 河冰 水力模型 热力模型 冰冻模型 数学模型 |
| 英文关键词: river ice hydraulic models thermo-mechanical models frozen models mathematical models |
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| 中文摘要: |
| 通常情况下,河流中的冰情可以按照冰的形成和消融过程分为3个阶段:结冰期,封冻期和解冻期.一个能够完整描述河流结冰、封冻和解冻过程的河冰数学模型由以下3个分模型组成:水力模型、热力模型和冰冻模型.水力模型用于计算河道中流场和其水力要素；热力模型用于计算水体热交换,水温分布和降温过程；冰冻模型用于模拟水内冰的产生,冰花输移,浮冰输移,底冰增厚和消融,冰盖的形成、推进和增厚,冰盖的热力增厚和消融,冰盖前缘下潜输冰能力和冰塞演变过程.这3个模型相互影响和作用,水力条件影响热力交换和冰冻过程,热力条件决定冰冻过程,冰冻过程又反过来影响水力条件和热力条件.本文给出一个能够完整描述河流结冰、封冻和解冻过程的一维河冰数学模型,当然也可以用其中的分模型计算某一特定河冰过程. |
| 英文摘要: |
| Normally,according to the ice formation and melting progresses,river ice phenomena can be divided into three steps: ice period,freeze-up period and frost free period.A river ice mathematical model which can completely describe the processes of these three steps is made up of three partial models: hydraulic,thermo-mechanical and frozen models.Hydraulic models are applied to calculate the flow field and other hydraulic elements.Thermo-mechanical models are used to calculate the heat exchanges,water-temperatur... |
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