【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。更多还原

【Abstract】 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.更多还原