中文摘要：

根据＂底挑＂这一新型消能工结构特点,基于水跃基本理论,研究和优化了计入反弧段离心力作用的跃前水深和考虑底挑反弧作用的跃后水深形成共轭水深时的计算方法,采用牛顿迭代法表达了底挑消能工共轭水深两者各自的计算式,并将优化后的共轭水深在水跃函数曲线图中补充体现。同时,以实际水利工程底挑结构为原型,按照枢纽既定工况,分别求得了共轭水深优化计算值与常规值,对比发现优化计算的第一共轭水深略大于常规值,而优化计算的第二共轭水深微小于常规值；并且结合水工模型试验研究验证了共轭水深优化计算的合理性和优势。

英文摘要：

To study the characteristics of a new energy dissipator or bottom-deflection stilling basin, conjugate depths have been calculated by the fundamental theory of hydraulic jump, and an experiment has been conducted to test and optimize the jump＇s initial depth under the flip bucket centrifugal force and the sequent depth via the bottom deflecting arc. Calculation formulas of these two depths are presented in Newton iterative form, and optimization calculations are expressed in curves of hydraulic jump functions. For the hydraulic jump on a bottom-deflection stilling basin of actual design, its initial and sequent depths were calculated and compared with conventional calculations. The optimized initial depth is slightly greater while the corresponding sequent depth slightly smaller. These calculations have been verified with the experimental data.