| 无黏性均匀沙起动临界条件的统一 |
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| 引用本文： | 钟亮,许光祥,马明生. 无黏性均匀沙起动临界条件的统一[J]. 水运工程, 2007, 0(8): 13-16 |
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| 作者姓名： | 钟亮 许光祥 马明生 |
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| 作者单位： | 1. 重庆交通大学河海学院,重庆,400074
2. 水利部珠江水利科学研究院,广东,广州,510611 |
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| 摘 要： | 采用确定性分析方法,建立无黏性均匀沙起动流速公式,并用实测资料对其进行验证。通过理论推导,得出基于剪切力和水流功率的均匀沙起动临界条件表达式。对基于起动流速、剪切力和水流功率的均匀沙起动临界条件进行统一,得出各表达式之间的相互转换关系,证明三种起动临界条件在本质上是相互统一的。
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| 关 键 词： | 无黏性均匀沙 起动流速 剪切力 水流功率 |
| 文章编号： | 1002-4972（2007）08-0013-04 |
| 收稿时间： | 2006-11-29 |
| 修稿时间： | 2006-11-292007-01-23 |
Generality of Incipient Motion Critical Conditions of Cohesionless Uniform Sediment |
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| ZHONG Liang,XU Guang-xiang,MA Ming-sheng. Generality of Incipient Motion Critical Conditions of Cohesionless Uniform Sediment[J]. Port & Waterway Engineering, 2007, 0(8): 13-16 |
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| Authors: | ZHONG Liang XU Guang-xiang MA Ming-sheng |
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| Affiliation: | 1. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. Hydraulics Research Institute of Pearl River Committee, Guangzhou 510611, China |
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| Abstract: | Based on deterministic method, an incipient bottom velocity formula of cohesionless uniform sediment is established, which is validated with measured velocity data and proved to agree well with experimental data. Based on both shear force and stream power and through theoretical derivation, the incipient motion critical conditions of cohesionless uniform sediment are achieved. The incipient motion critical conditions based on velocity, shear force and stream power are generalized, and their inter-conversion relations are obtained, proving that the three critical conditions are unitized essentially. |
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| Keywords: | cohesionless uniform sediment incipient velocity shear force stream power |
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