基于时间反转法的管道缺陷定位研究

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中图分类号：TE973文献标识码：ADOI：10.12473/CPM.202409069

Abstract：Accuratelyandeficiently detecting and locating defects incritical parts of pipelines is an urgent problemthatneeds tobesolved.First，theaxialdisplacementtimehistory signalofpipelinedefectsobtained from direct guided wave detection test was matched，trackedand denoised to accurately locate the axial position of pipeline defects.Second，azero-defect finite element reference model with the same geometric and material parameters as the actualpipeline was built.Third，thedefect echo and itsconversion mode were extracted from the axial displacement time history signal.Fourth，timereversal was conducted to generate atime-reversal guided wave excitation signal.Fifth，the excitation signal was reloaded in the reference model to simulate the propagation process of time-reversal guided waves in zero-defect pipelines，and the time-reversal guided wave energy would be focused on thecentral positionof theoriginaldefecton the circumferential section.Finally，the circumferential positionof the pipelinedefect was determined bycalculating the maximumaxial displacement at thelocation of the defecton the reference model. The research conclusions provide new ideas for locating pipeline defects.

Keywords： pipeline；defect location；ultrasonic guided wave； time reversal method;reverse guided wave; PZT sensor

0 引言

管道在长期服役过程中，由于自然老化与外界环境的作用，可能出现裂纹、腐蚀等损伤缺陷[1-4]，导致管道在运行过程中出现安全隐患。（剩余14072字）