采用功率谱分析、相干分析、模态分析相结合方法 ,对高层供水系统振动、噪声进行了分析 ,找出其主要的噪声源及其主要频率成分 ,从而为治理噪声提供可靠的依据。 Using the method of power spectrum analysis, coherence analysis and modal analysis, the vibration and noise of high-rise water supply system are analyzed, and the main noise sources and their main frequency components are found out, so as to provide a reliable basis for noise control.