| 泥沙颗粒形状对非均匀沙起动条件的影响 |
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| 引用本文： | 李文萍,曹叔尤,刘兴年.泥沙颗粒形状对非均匀沙起动条件的影响[J].水科学进展,2007,18(3):342-345. |
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| 作者姓名： | 李文萍 曹叔尤 刘兴年 |
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| 作者单位： | 四川大学水力学与山区河流开发保护国家重点实验室, 四川, 成都, 610065 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | 根据非均匀沙颗粒的不均匀性,引入颗粒形状系数,通过分析泥沙颗粒形状系数和相对暴露度的影响,建立了等效粒径表达式;并通过泥沙起动受力分析,推导得到泥沙起动临界条件表达式.实测资料验证表明,计算值与实测值符合较好.
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| 关 键 词： | 非均匀沙 颗粒形状 暴露度 等效粒径 |
| 文章编号： | 1001-6791（2007）03-0342-04 |
| 收稿时间： | 2006-03-12 |
| 修稿时间： | 2006-03-122006-05-17 |
Effect of grain shape on incipient motion of non-uniform sediment |
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| LI Wen-ping,CAO Shu-you,LIU Xing-nian.Effect of grain shape on incipient motion of non-uniform sediment[J].Advances in Water Science,2007,18(3):342-345. |
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| Authors: | LI Wen-ping CAO Shu-you LIU Xing-nian |
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| Institution: | State Key Laboratory of Hydraulic and Mountain River Eng, Sichuan University, Chengdu 610065, China |
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| Abstract: | Based on non-uniformity, the grain shape coefficient is introduced. By analyzing influence of shape coefficient and exposure degree, the formulas for calculating equivalent grain and the incipient motion condition of non-uniform sediment are established by the relative exposure degree and shape coefficient. Verified by using the experiment data, the result shows that the experiment data are adjacent to the measured value. |
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| Keywords: | non-uniform sediment grain shape exposure degree equivalent grain |
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