反拱透水底板拱端推力与板块位移研究  

Study on the thrust at springer and plate displacement of the pervious slabs in inverted-arch plunge pool

作　　者：张少济[1] 杨敏[1] 孙勉[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《水利学报》2011年第6期666-671,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金(50539060;50779044);国家杰出青年基金资助项目(50725929)

摘　　要：本文基于模型试验并结合数值模拟研究了反拱透水底板的拱端推力与板块位移特性。结果表明,与不透水底板相比,透水底板可以显著的减小拱端推力,并且拱端推力与板块位移均随开孔率的增加而减小,从而可以提高反拱底板的稳定性。结合拱端推力的频谱分析可知,开孔后拱端推力的脉动能量降低,并且功率谱重心向低频移动。The hydrodynamic characteristics of pervious slabs in inverted-arch plunge pool were studied by model test and numerical simulation. Compared with impervious slabs, the thrust at springer acting on the pervious slabs can be reduced obviously. The thrust at the springer and plate displacement decrease with the increase of the opening rate of slabs. Therefore, the stability of previous inverted-arch slabs is improved. The frequency spectrum analysis of the thrust at springer show that the energy fluctuation of thrust at springer reduced when previous holes on the slab are constructed and the barycenter of power spectrum transfer to lower frequency.

关 键 词：水利水电工程 反拱水垫塘 透水底板 拱端推力 板块位移 

分 类 号：TV135.2[水利工程—水力学及河流动力学]