水利水电科技进展2018，Vol.38Issue(2)：33-38,69,7.DOI:10.3880/j.issn.1006-7647.2018.02.006
底流钢膜消力池底板上表面脉动压力试验
Experimental study on fluctuating pressure acting on the upper surface of the slab in a underflow stilling basin with a steel membrane
摘要
Abstract
To ensure the safety of the protective structures of a stilling basin under high speed flow, stilling basin with a steel membrane is proposed as a new type of protective structure in which is a layer of thin homogeneous perforated steel plate is laid on the stilling basin slab. Based on hydraulic model test,the effect of the uniform perforated steel membrane on the distribution of the fluctuating pressure acting on the upper surface of the slab was studied. The results show that, when the uniform perforated steel membrane is laid, the fluctuating pressure intensity coefficient of the upper surface is reduced and the probability density function basically follows the normal distribution with more concentrated range of fluctuating pressure amplitude in the water rolling zone at the front of the stilling basin. The correlation and the spatial integral scale of the longitudinal points decrease,indicating that the vortex retention is reduced. The dominant frequency of the fluctuating pressure is basically the same,but the pressure fluctuation energy has a narrower band. Compared with the pervious slab,the protective structure of steel membrane can effectively reduce the fluctuating load acting on the upper surface of the slab in the front of the stilling basin, indicating that this new type of protective structure shows certain feasibility.关键词
消力池/防护结构/钢膜/脉动压力/透水底板/模型试验Key words
stilling basin/protective structure/steel membrane/fluctuating pressure/pervious slab/model test分类
建筑与水利引用本文复制引用
齐春风,练继建,刘昉,李会平,欧阳群安..底流钢膜消力池底板上表面脉动压力试验[J].水利水电科技进展,2018,38(2):33-38,69,7.基金项目
国家自然科学基金(51579172) （51579172）
国家自然科学基金青年科学基金(51509180) （51509180）
中国华能集团科技项目(HNKJ16-H12) （HNKJ16-H12）
