The thesis analyses the signal of vibration and noise of water system in pump room through power frequency spectrum analysis and coherence analysis . meanwhile uses finite element method ( fem ) to investigate the characteristics of pipe system 论文通过功率谱分析、相干分析等方法对供水系统泵房内的管道系统进行振动与噪声信号的分析，用有限元的方法分析管道系统的结构特性。
