| 非均匀沙分级起动切应力探讨 |
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| 引用本文： | 解刚,刘兴年.非均匀沙分级起动切应力探讨[J].水利水电科技进展,2003,23(6):1-3. |
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| 作者姓名： | 解刚 刘兴年 |
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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： | 国家自然科学基金资助项目(50279024) |
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| 摘 要： | 在考虑水流条件、床沙组成的基础上,通过对泥沙颗粒受力分析,建立了滚动平衡方程式,得出非均匀沙分级起动切应力公式.在建立公式的过程中考虑了床沙非均匀性对起动的影响,定义了附加作用力G,并将其引入公式中.通过实验数据的验证表明公式的计算结果与实验数据符合良好.
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| 关 键 词： | 非均匀沙 起动切应力 起动条件 泥沙 |
| 文章编号： | 1006-7647(2003)06-0001-03 |
| 修稿时间： | 2003年5月17日 |
Discussion on stage threshold shear stress of non-uniform sediment |
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| XIE Gang,et al.Discussion on stage threshold shear stress of non-uniform sediment[J].Advances in Science and Technology of Water Resources,2003,23(6):1-3. |
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| Authors: | XIE Gang |
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| Abstract: | Based on the analysis of water flow condition, composition of bed sediment, and forces on grains, a rolling balance equation for grains is developed, and a formula for stage threshold shear stress of non uniform sediment is derived. In the derivation of the formula, the non uniformity of bed sediment is considered, and an additional force G is defined and introduced. It is verified that the calculated results are in good agreement with the experimental data. |
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| Keywords: | non-uniform sediment threshold shear stress starting condition sediment |
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