基于振动能量分析的管道裂痕诊断  

Detection of Pipe Cracks by Vibration Spectrum Analysis

作　　者：王晓[1] 张朝晖[1] 蓝金辉[1] 恩西杜[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083

出　　处：《仪器仪表学报》2005年第z2期606-607,共2页Chinese Journal of Scientific Instrument

摘　　要：提出了一种基于振动能量分析的管道袭痕的检测方法,沿管壁径向激振并在轴向平行线上检振,振动波经过裂痕时,高频成分因被空气隙吸收而严重衰减,低频成分靠衍射透过裂痕,衰减少,实验及数据分析证实了这个结论。A method for crack detection in metallic pipes based on vibration spectrum analysis is presented.Ex-citing the pipe on radius and detecting the wave at the same line parallel with the axis,the higher-frequency com-ponents of waves are absorbed considerably by the air crack,while the lower-frequency components can passthrough the crack nearly without decay as diffraction.The experiment data and analysis show the conclusion.

关 键 词：管道 裂痕诊断 功率谱 

分 类 号：TH7-55[机械工程—仪器科学与技术]