摘要
为了研究水泵吸水池内部漩涡流动的非定常特性,测量了该流动的压力信号和振动信号,并用小波互相关分析的方法对所测信号进行处理。使用该方法,可以得到任意两种信号在不同尺度下的相互关系,并且通过与传统互相关分析方法的对比,得到了两种信号的主导相关尺度。分析结果表明,水泵吸水池内部流动所引起的压力和振动变化关系密切,都是由吸入涡的非定常特性引起的。
The pressures and vibrations of the flow in a pump sump were measured to analyze the unsteady characteristics of the flow. Wavelet cross-correlation was used to process the signals. The two unsteady signals were related at different scales using the wavelet cross-correlation analysis. The dominant correlation scales were obtained by comparing the wavelet cross-correlation results with conventional cross-correlation results. The results show that the pressure signal changes are closely related to the vibrations, both of which are caused by the unsteady characteristics of the vortex flow.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第5期697-699,共3页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(50176022)
关键词
水泵
吸水池
小波互相关
主导相关尺度
非定常信号
pump
sump
wavelet cross-correlation
dominant correlation scales
unsteady signals
