| 泥沙颗粒相对隐蔽度在散体沙起动研究中的应用 |
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| 引用本文： | 孟震,杨文俊.泥沙颗粒相对隐蔽度在散体沙起动研究中的应用[J].长江科学院院报,2011,28(7):1-6. |
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| 作者姓名： | 孟震 杨文俊 |
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| 作者单位： | 长江科学院 水利部江湖治理与防洪重点实验室，武汉 430010 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助课题(2007CB7141O6); 国家自然科学基金资助项目(51079008); 湖北省自然科学基金(2010CDB00201) |
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| 摘 要： | 运用泥沙隐蔽度的研究成果，结合泥沙起动的滚动模型，导出了以隐蔽度为参数的泥沙近底作用起动流速公式。通过对该式分别进行的极限分析和单调性分析，论述了散体沙起动的几个物理现象，论证了宽级配非均匀沙的起动特性。经过对泥沙颗粒隐蔽度分布特性及泥沙起动标准的分析，建立了泥沙颗粒隐蔽度与无因次起动切应力之间的数值关系。最后借鉴前人的研究成果，验证了本文公式的适用性。
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| 关 键 词： | 隐蔽度 起动 极限 单调性 起动条件 |
Hidden Degree Applied in the Research on Incipient Motion of Cohesionless Sediment Particles |
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| MENG Zhen,YANG Wen-jun.Hidden Degree Applied in the Research on Incipient Motion of Cohesionless Sediment Particles[J].Journal of Yangtze River Scientific Research Institute,2011,28(7):1-6. |
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| Authors: | MENG Zhen YANG Wen-jun |
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| Affiliation: | Key Laboratory of Management of Rivers and Lakes & Flood Control of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China |
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| Abstract: | Based on the results of sediment hidden degree research,an incipient velocity formula with hidden degree as its parameter was deduced in this paper using the rolling model of sediment incipient motion.The formula was applied in limit analysis and monotonicity analysis to theoretically expound the physical phenomena of incipient motion and to demonstrate the starting characteristic of broadly graded non-uniform cohesionless sediment.The numerical relations between hidden degree and non-dimensional incipient ... |
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| Keywords: | hidden degree incipient motion limit monotonicity incipient motion conditions |
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