弧形闸门流激振动脉动压力HHT分析

HHT Analysis of Stochastic Fluctuant Pressure for Flow-induced Vibration in Radial Gate

介绍了新近提出的Hilbert-Huang变换(HHT)方法,并且采用该方法对典型水流脉动压力时域过程进行了平稳性检验。结果表明,在一定开启工况下,作用于闸门体的水流脉动压力可视为各态历经平稳随机过程,其特征量可应用随机函数理论及其谱分析获得。

A new method Hilbert-Huang transform （HHT） was introduced in this paper, and the stationarity of typical time domain data of stochastic fluctuant pressure was tested by using this method. The conclusion indicates that stochastic fluctuant pressure on radial gate can be treated as stationary random process going through all of states in the case of certain opening and the characteristic value can be obtained from random function theory and spectrum analysis.