摘要
在明渠清水条件下,测量不同水深情况下近底流速瞬时分布,得知近底流速符合平稳随机过程。依据大量实测试验数据,利用傅立叶变换将时域内流速脉动信号转化到频域内进行谱分析,应用统计分析发现随机相位角服从正态分布,为近底流速谱的建立奠定基础。
The data of near-bed velocity are very important and of great application value to engineering.In condition of open channel and rinsing water,the data of near-bed velocity are acquired which accord with stationary stochastic processes.According to the experiment data,the spectum characteristics of velocity are transformed from current velocity pluse signal in time domain to signal in frequency domain with FFT.The random phase angle is close to the normal distribution based on the mathematical stastics which is the base of spectrum of near-bed velocity.
出处
《水运工程》
北大核心
2010年第3期7-10,共4页
Port & Waterway Engineering
关键词
近底流速
试验研究
平稳随机过程
谱分析
near-bed velocity
experimental study
stochastic process
spectrum analysis
