现有动床阻力计算公式验证与比较
发布时间：2018-09-12 21:18
【摘要】：以64组室内水槽试验资料和1 000多组黄河下游河道实测水沙资料为依据,首先对Van Rijn、张红武及秦荣昱提出的动床阻力公式进行评价,同时采用数理统计方法中偏差比R、几何标准差AGD、均方根RMS对这些公式的计算精度进行比较.计算结果表明:对于河道资料,张红武公式的计算精度最高;对于水槽资料,Van Rijn公式的计算精度最高.然后利用实测资料对糙率系数n的影响因素做了进一步分析.分析表明糙率系数随弗劳德数的增大而减小,并拟合得到两者的对数型关系式,该式对黄河下游及水槽床面糙率的预测具有较高的精度.
[Abstract]:Based on 64 groups of indoor flume test data and more than 1 000 groups of measured water and sediment data of the lower Yellow River, the dynamic bed resistance formula proposed by Van Rijn, Zhang Hongwu and Qin Rongyu is evaluated. At the same time, the accuracy of these formulas is compared by using the deviation ratio R and the geometric standard deviation AGD, root mean square RMS in the mathematical statistical method. The results show that the accuracy of Zhang Hongwu formula is the highest for channel data and the highest for flume data. Then the influencing factors of roughness coefficient n are further analyzed by using the measured data. The analysis shows that the roughness coefficient decreases with the increase of Froude number, and the logarithmic relationship between them is obtained by fitting, which has a high accuracy in predicting the roughness of the lower Yellow River and the flume bed.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金项目(编号:51379156) 水利部公益性行业科研专项经费项目(编号:201401038)
【分类号】：TV149
本文编号：2240243
[Abstract]:Based on 64 groups of indoor flume test data and more than 1 000 groups of measured water and sediment data of the lower Yellow River, the dynamic bed resistance formula proposed by Van Rijn, Zhang Hongwu and Qin Rongyu is evaluated. At the same time, the accuracy of these formulas is compared by using the deviation ratio R and the geometric standard deviation AGD, root mean square RMS in the mathematical statistical method. The results show that the accuracy of Zhang Hongwu formula is the highest for channel data and the highest for flume data. Then the influencing factors of roughness coefficient n are further analyzed by using the measured data. The analysis shows that the roughness coefficient decreases with the increase of Froude number, and the logarithmic relationship between them is obtained by fitting, which has a high accuracy in predicting the roughness of the lower Yellow River and the flume bed.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金项目(编号:51379156) 水利部公益性行业科研专项经费项目(编号:201401038)
【分类号】：TV149
【相似文献】
相关期刊论文 前10条
1 汪德r ;G.J.Klaassen;;水槽动床试验中最佳宽深比的确定[J];华东水利学院学报;1985年01期
2 刘鹏飞;冯小香;乐培九;;动床阻力研究与应用[J];水动力学研究与进展A辑;2012年05期
3 屈盂浩;黄河动床河道模型的相似原理及设计方法[J];泥沙研究;1981年03期
4 洪大林,朱立俊,缪国斌,唐存本;松性土新开挖河道动床冲刷模型设计方法[J];水科学进展;1999年01期
5 徐啸;波、流共同作用下浑水动床整体模型的比尺设计及模型沙选择[J];泥沙研究;1998年02期
6 吴伟明;天然河流平面二维动床阻力问题研究[J];武汉水利电力大学学报;1996年03期
7 黄才安,严恺;动床阻力的研究进展及发展趋势[J];泥沙研究;2002年04期
8 陆永军;荆江重点浅滩现状整治的二维动床数学模型研究——模型的建立[J];水道港口;1997年01期
9 王学功;葛国兴;吴其保;;变态动床泥沙模型紊动相似和阻力相似研究[J];泥沙研究;2009年05期
10 万声淦;;动床k-ε紊流模型研究[J];水利水运科学研究;1993年04期
相关会议论文 前1条
1 王学功;葛国兴;吴其保;;论河流动床泥沙模型相似性问题[A];第七届全国水动力学学术会议暨第十九届全国水动力学研讨会文集（下册）[C];2005年
，本文编号：2240243
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2240243.html
