水利学报2011，Vol.42Issue(11)：1368-1371,1378,5.
平底水垫塘透水底板下表面脉动压力试验研究
Experimental investigation of fluctuating pressure acting on the undersurface of pervious slabs in flat-bottom plunge pool
摘要
Abstract
Based on the model test results,the characteristics of fluctuating pressure acting on the undersurface of the pervious slab in plunge pool were investigated and the distribution law,the probability characteristics,the cross correlation characteristics and the spectrum characteristics of fluctuating pressure were analyzed for both the impervious slabs and pervious slabs with different aperture ratios in the flat-bottom plunge pool. The analysis results show that in the impacted area fluctuating pressure intensity coefficient increases with the increase of pervious coefficient,the correlation coefficient slightly reduces as the pervious coefficient increases,which shows that the flow eddies retentivity reduces. Comparing with the impervious slabs,the pressure fluctuation energy of pervious slabs is more concentrated on low frequency section. The relations between the pervious coefficient（k） and fluctuating pressure acting on the undersurface of the pervious slab are established.关键词
水利水电工程/平底水垫塘/透水底板/模型试验/脉动压力Key words
hydraulic and hydroelectric engineering/flat-bottom plunge pool/pervious slab/model test/fluctuating pressure分类
建筑与水利引用本文复制引用
杨敏,李树宁..平底水垫塘透水底板下表面脉动压力试验研究[J].水利学报,2011,42(11):1368-1371,1378,5.基金项目
国家自然科学基金创新研究群体科学基金 （）
国家自然科学基金项目 （）
水利部公益性行业科研专项项目 （）
西部交通建设科技项目 （）
