多股水舌入射水垫塘底板脉动压力互相关特性及其灰色关联分析

Correlation Analysis of Fluctuating Pressure on the Bottom Wall of Plunge Pool by Multiple Impinging Jets and Its Grey Correlation Analysis

本文对１：１００比尺的小湾水垫塘底板脉动压强进行了量测，对水舌冲击区附近各测点，进行了时空相关分析。结果表明，相关系数随水垫深度增加有所增大，随离冲击区距离的增大呈近似指数衰减。文中还首次引入了灰色关联分析方法对其进行了灰色关联分析，结果表明其关联度均在０．６以上，说明灰色关联分析在脉动压强相关分析中有其一定的优越性。

In this paper,the fluctuating pressure on the bottom wall of a large scale hydraulic model of plunge pool was measured. The correlation analysis of these test points in the area near the jets impact zone has been carried out. The results showed that the correlation coefficient increased with the increasing of the water cushion depth and attenuated in exponentorm with the increasing of the distance from the impact zone. The Grey correlation analysis method was also introduced firstly to do their grey correlation analysis in this paper. The results showed that the Grey correlation coefficent were all larger than 0, 6,and indicated that the Grey ocrrelation analysis has showed its some advantages in the correlation analysis of fluctuating pressure.