| 孙志林,田林.非均匀沙分级推移质公式[J].水利学报,2001,32(5):0065-0071 |
| 非均匀沙分级推移质公式 |
| Fractional bedload formula of non uniform sediment |
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| DOI： |
| 中文关键词: 非均匀沙 推移质公式 分级输沙率 随机 力学模式 水槽试验 |
| 英文关键词: non uniform sediment bedload formula fractional transport rate stochastic-mechanistic model flume experiment |
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| 摘要点击次数: 1944 |
| 全文下载次数: 169 |
| 中文摘要: |
| 根据近底泥沙交换的随机-力学模式及输沙率概率分布，从理论上建立了非均匀沙任意粒级推移质输沙率的新公式。采用作者提出的分级起动概率和颗粒跳跃速度表达式处理有关参数，而公式所及常数则由均匀沙输移试验资料确定。由此获得的非均匀沙分级推移质公式物理概念清楚、数学处理严密、能自动适应均匀沙情形。用非均匀沙分级输移试验资料的验证结果表明，理论能合理地描述非均匀沙推移质运动的客观规律。 |
| 英文摘要: |
| Based on the stochastic mechanistic model of non uniform sediment exchange near the river bed and the probabilistic distribution of fractional transport rate, a new bedload formula for any fraction of non uniform sediment is theoretically developed The parameters are determined from the relations proposed by the authors. Two constants are derived from experimental data of the bedload transport rate for uniform sediment. The fractional bedload formula of non uniform sediment is characterized by clear physical concept, a strict mathematical derivation and a self adaptability to uniform sediment. The verification of the oretical formula with experimental data on the transport of non uniform sediment under full motion shows that observation agrees well with predicted fractional bedload transport rate. |
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