| 动床沙粒阻力计算的研究 |
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| 引用本文： | 陈小秦,黄才安. 动床沙粒阻力计算的研究[J]. 苏州大学学报(工科版), 2007, 27(6): 53-57 |
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| 作者姓名： | 陈小秦 黄才安 |
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| 作者单位： | 1. 吴江市太浦河工程管理所,江苏,吴江,215200
2. 扬州大学水利科学与工程学院,江苏,扬州,225009 |
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| 摘 要： | 沙粒阻力的计算是泥沙运动力学的重要问题。基于泥沙的起动阻力来研究沙粒阻力的计算，是一种较为直接的方法。利用泥沙起动的Shields曲线与明渠阻力特性之间的相似性，结合实测泥沙起动资料给出了沙粒阻力的计算公式。该公式表示的沙粒阻力系数仅是能坡的函数，从而避免了采用相对水深时床沙代表粒径选择的困难。验证结果表明，该公式要优于其他沙粒阻力的计算公式。
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| 关 键 词： | 沙粒阻力 泥沙起动 能坡 |
| 文章编号： | 1673-047X（2007）06-0053-05 |
| 收稿时间： | 2007-07-02 |
| 修稿时间： | 2007-07-02 |
A Study on the Sand-grain Resistance in Movable Bed |
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| CHEN Xiao-qin,HUANG Cai-an. A Study on the Sand-grain Resistance in Movable Bed[J]. Journal of Suzhou University(Engineering Science Edition), 2007, 27(6): 53-57 |
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| Authors: | CHEN Xiao-qin HUANG Cai-an |
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| Abstract: | Computation of sand-grain resistance is one of the most important issues in sediment transport mechanics. It is proposed that computation of sand-grain resistance based on resistance of sediment incipient motion is a direct method. By use of the similarity between Shields diagram and open channel resistance, the equation of sand-grain resistance is derived by combining with measured incipient data. This equation shows that sand -grain resistance coefficient is only a function of energy slope, and independent of sediment diameter, so the difficult of selecting bed representative diameter. Verification results show that the equation proposed by this paper is super to other sand - grain resistance equations. |
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| Keywords: | sand-grain resistance sediment incipient motion energy slope |
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