| 杨具瑞,方 铎,何文社,李昌志.非均匀沙起动规律研究[J].水利学报,2002,33(10):0082-0086 |
| 非均匀沙起动规律研究 |
| Study on laws of incipient motion for non uniform sediment |
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| DOI： |
| 中文关键词: 非均匀沙 起动流速 附加阻力 水流结构 |
| 英文关键词: non uniform sediment incipient velocity additional f orce flow structure |
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| 摘要点击次数: 1895 |
| 全文下载次数: 75 |
| 中文摘要: |
| 从非均匀沙受力分析出发，将非均匀泥沙起动所受到的附加作用力分为两部分。用滚动平衡方程式建立了能反映非均匀沙不均匀性的起动流速公式。利用天然河流实测资料和水槽实验资料率定计算公式中的系数，并用其它天然河流和水槽资料进行了验证。结果表明，公式的计算值与天然河流的实测值和水槽实验的实验值符合较好。 |
| 英文摘要: |
| According to the analysis on the forces acting on non-uniform sediment, the additional force is divided into two parts. One is caused by the interaction between coarse particles and fine particles of the bed material and another is caused by the flow structure near the riverbed. A formula for calculating the threshold velocity of the non-uniform sediment is established based on the critical condition of the particle begins to roll. Coefficients in the formula are determined both by flume experiment and field data. The validity of the formula is verified by another sets of experiment and field data. |
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