【作者】 成军；

【导师】 周著； 侯杰； 邱秀云；

【作者基本信息】 新疆农业大学 ， 水力学及河流动力学， 2003， 硕士

【摘要】 本文对设置有悬栅的泄水陡槽内的水流水力特性进行了物理模型试验研究，并在此基础上进行了初步的理论分析，取得了一些成果。研究发现，不同悬栅设置高度，不同栅条间距时产生的消能效果不同，并对此用模型试验进行了最佳悬栅高度及栅条间距的优化分析。另外，通过局部模型的二维流场测试分析，比较了工字型栅条和矩形栅条两者的流场特性。简要地阐述了消能的含义及多种消能工的研究发展成果。然而，文章主要针对已获国家自然科学基金资助，且已在实际工程实践中产生了良好消能效果的陡坡急流悬栅消能工的部分试验成果，进行了较全面深入地讨论，即具体根据试验资料系统分析了悬栅陡槽内泄水时的流速分布、底板压力分布及水面线变化情况。通过对工字型和矩形两种型式栅条周围流场的测试，说明工字型栅条对流场变化的影响比矩形栅条的大。文章同时进一步采用选进的投影寻踪法对试验数据作了优化处理，使其结果更加可靠，更具实用价值，以供同类型工程设计时参考更多还原

【Abstract】 Physical modeling and preliminary theory of hydraulic characteristic of supercritical flow of gradient with suspension girder are studied in this paper. The different altitude up to base plate and distance between suspension girder has been set up and it lead to different damping ratio. Lots of experiment is done in order to find optimum altitude and distance of suspension girder. Experiment data is analyzed with method of Projection Pursuit for more reliability and utility value. This paper first systematically studied energy dissipater of suspension girder in steep gradient with supercritical flow according to used in actual engineering and received perfect effect. Experimental studies about the distribution velocity, the variation of water surface and pressure are undertaken. In local model, the different kind of suspension girder—I and rectangular beam make different field of velocity characteristic surrounding through two-dimensional velocity experiment. Result display I has more influence to velocity around beam than rectangular beam. The result has some reference value for actual application更多还原