水载压力对管道超声导波信号的影响研究
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TB559 TH878

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国家重点研发计划项目(2023YFF0716602,2019YFC0312404)项目资助


A study of the effect of waterborne pressure on ultrasonic guided wave signals in pipelines
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    摘要:

    为了研究水载压力对管道超声导波信号的影响,利用半解析有限元的方法分析了管道导波的频散曲线和波结构,选择 L(0,2)模态导波用于实验验证。 设计了一个可承受 30 MPa 压力的防水卡箍,对管道上的压电传感器进行封装。 将安装了防 水耐压卡箍的管道放入压力舱中进行打压循环测试,压力在 0~ 30 MPa 之间变化。 打压过程中采集无损伤及 5% 损伤的管道超 声导波信号,分析水载压力对导波信号的影响。 实验结果表明,该防水卡箍具有良好的防水和耐压性能,水载压力对 L(0,2)模 态导波信号幅值没有显著影响。

    Abstract:

    In order to study the effect of water-loaded pressure on the ultrasonic guided wave signals, the dispersion curve and wave structure of guided wave in the pipe are analyzed by using the semi-analytical finite element (SAFE) method. The L(0,2) mode guided wave is selected in the detection experiment. A waterproof clamp that can withstand a pressure of 30 MPa is designed to encapsulate the piezoelectric transducer on the pipe. The encapsulated pipe is placed into a pressure chamber for the pressure cycle test, where the pressure varies between 0 MPa and 30 MPa. The guided wave signals of the heathy pipe and the damaged pipe with 5% area loss are collected during the pressure cycle experiments in order to analyze the effect of the water-loaded pressure on the guided wave signals. The experimental results show that the waterproof clamp has good waterproof and pressure-resistant properties, and at the same time, the water-loaded pressure does not have a significant effect on the amplitude of the L(0,2) modal waveguide signal.

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胡晓谍,林霆威,张维煊,魏子麒,王奕首.水载压力对管道超声导波信号的影响研究[J].仪器仪表学报,2024,45(3):206-213

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  • 在线发布日期: 2024-05-31
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