摘要
本文根据弯道纵向垂线平均流速分布公式,建立了弯道床面剪切力沿程及沿河宽分布的计算公式。利用实测试验资料对公式的计算结果进行了比较,成果表明,计算值与实测值基本吻合。依据床面剪切力分布公式,结合前人的一些研究成果,较系统地分析了相对曲率半径r_0/B、来流条件τ_0、河床粗糙情况c、相对水深H/r_0、弯道中心角φ及河床断面形态h/H等因素对床面剪切力分布的影响,所得结论与试验成果是一致的。
In this paper, in accordance with the formula of depth-averaged longitudinal velocity distribution, aformula of longitudinal bed shear stress distribution along channel bend is set up. This formula has beenverified with experimented data, the agreement with computation and experiment results is satisfactory.Meanwhile, on the basis of the formula of bed shear stress distribution, the influences of the relative radiusof curvature r_o/B, the entrance condition τ_o, the roughness of channel bend C, the relative depth H/r_o,the angle of channel bend φ, the section configuration h/H and other factors to bed shear stress distribu-tion in channel bends are analysed. The derivatives of conclusion are in agreement with the experimentalresults of predecessors.
出处
《西北水资源与水工程》
1993年第4期21-27,共7页
Northwest Water Resources & Water Engineering
