| 泥沙起动规律初探 |
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| 引用本文： | 何文社,方铎,曹叔尤,李昌志,郭志学. 泥沙起动规律初探[J]. 泥沙研究, 2002, 104(5): 67-70 |
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| 作者姓名： | 何文社 方铎 曹叔尤 李昌志 郭志学 |
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| 作者单位： | 四川大学,高速水力学国家重点实验室,四川,成都,610065 |
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| 基金项目： | 国家自然科学基金和水利部联合资助重大项目 (5 9890 2 0 0 )，九五课题资助 (95 5 4) |
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| 摘 要： | 非均匀沙运动规律与均匀沙明显不同。故从非均匀沙起动的特点出发 ,阐述了其运动机理 ,采用滚动起动模式。通过对附加质量力的概念及表达式和相对暴露度参数的引入 ,推得了非均匀沙起动公式。并用实测资料进行了验证 ,同其它学者们的公式相比较为合理。作为特例得到了均匀沙的起动公式 ,该系数包含了其它公式。说明本文公式基本能反映非均匀沙的起动特性
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| 关 键 词： | 起动公式 非均匀沙 附加质量力 相对暴露度 |
| 文章编号： | 0468-155X(2002)05-0067-04 |
| 修稿时间： | 2001-05-30 |
Study on Laws of Threshold Motion for Non-uniform Sediment |
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| HE Wen she,FANG Duo,CAO Shu you,LI Chang zhi,GUO Zhi xue. Study on Laws of Threshold Motion for Non-uniform Sediment[J]. Journal of Sediment Research, 2002, 104(5): 67-70 |
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| Authors: | HE Wen she FANG Duo CAO Shu you LI Chang zhi GUO Zhi xue |
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| Abstract: | Obvious differences of transport mechanism exist between the uniform and non uniform sediment. In this paper, the formula of calculating threshold velocity of non uniform sediment is established in consideration of their relative degree of expose, and the additional mass force, etc. Coefficients in the formula are determined based on experimental and field data. Verifications with measured data show that the theoretical formula is the best reasonable formula comparing with the others that were collected. The computed results fully reflect the characteristics of threshold motion of non uniform sediment. The formula of uniform sediment is established also, as a special case. |
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| Keywords: | formula of threshold velocity non uniform sediment additional mass force relative degree of expose |
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