基于摄动理论的泥沙群体沉降公式研究

发布时间：2018-05-21 17:50

本文选题：泥沙群体沉降 + 沉降公式　；参考：《长江科学院院报》2017年01期

【摘要】：国内外许多学者对单个颗粒泥沙沉降公式进行了大量的实验研究和分析,鉴于单个颗粒的沉速与群体沉降可以相差10倍,目前泥沙群体沉降公式大多为经验表达式,因此,深入研究群体颗粒泥沙沉降公式有重要的意义。考虑到在群体泥沙沉降中粗细颗粒粒径大小对泥沙沉降公式的影响,基于摄动理论和最小二乘法,在泥沙群体沉降一般模式的基础上,提出一种新的泥沙群体沉降计算模式。通过对现场实测资料和水槽试验数据进行计算拟合,并与其它经典公式相比较,发现所推导的公式要优于后者。研究结果表明:针对群体泥沙沉降中粗细颗粒粒径大小,考虑其颗粒间的相互影响,按群体泥沙颗粒粒径大小范围分别考虑,是一种群体泥沙沉降计算比较有效的途径。
[Abstract]:Many scholars at home and abroad have done a lot of experimental research and analysis on the single particle sedimentation formula. In view of the fact that the settling velocity of single particle can be 10 times different from that of the group settlement, at present, most of the sediment settlement formulas are empirical expressions. It is of great significance to study the formula of population particle sediment sedimentation in depth. Considering the influence of the size of coarse and fine particles on the sediment settlement formula, a new calculation model of sediment mass settlement is proposed on the basis of perturbation theory and least square method, and on the basis of the general model of group sediment settlement. The field measured data and flume test data are calculated and fitted, and compared with other classical formulas, it is found that the derived formula is superior to the latter. The results show that considering the size of coarse and fine particles in mass sediment sedimentation, considering the interaction between particles and considering the size range of mass sediment particles, it is an effective way to calculate the mass sediment sedimentation.
【作者单位】：重庆交通大学水利水运工程教育部重点实验室;重庆交通大学国家内河航道整治工程技术研究中心;重庆交通大学西南水运工程科学研究所;重庆第二师范学院;
【基金】：国家自然科学基金项目(51509026) 国家重大水资源高效开发利用专项计划(2016YFC0402104) 重庆市基础与前沿研究计划资助项目(cstc2016jcyj A0380) 省部共建水利水运工程教育部重点实验室暨国家内河航道整治工程技术研究中心开放基金(SLK2016B03) 内河航道整治技术交通行业重点实验室开放基金(NHHD-201514)
【分类号】：TV142.1

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