【摘要】 通过线性相关分析和投影寻踪回归分析,对不同粗糙壁面人工渠道糙率系数的试验结果进行数据分析,根据前期研究结果,确定弗劳德数Fr、流量Q、渠道平均水深h、绝对粗糙度Δ、底坡坡降i和雷诺数Re为影响因子,探讨各水力要素对人工渠道糙率系数影响的主次关系。结果表明:对不同粗糙壁面人工渠道糙率系数重要的影响因子为底坡坡降i、渠道平均水深h和弗劳德数Fr,其中弗劳德数Fr为改变人工渠道糙率系数较重要的影响因子,明渠水流的糙率系数随着流态的变化而变化。更多还原

【Abstract】 Through the linear correlation analysis method and the projection pursuit regression,it developed data analysis of the experimental results of roughness coefficient of artificial channels in different rough surfaces. According to the results of previous studies,it determined the Buddha Froude number Fr,flow rate Q,average depth of channel h,absolute roughness of delta Δ,bottom slope i and Reynolds number Re as the impact factors. It discussed the primary and secondary relations of the factors affecting the roughness coefficient of the artificial channel. The results show that the factors influencing the roughness coefficient of the artificial channels in different rough surfaces are bottom slope i,the average depth of channel h and the number of Fr,of which,the number of Fr is the important factor to change the roughness coefficient and the open channel flow roughness coefficient varies with flow changes.更多还原