水载压力对管道超声导波信号的影响研究
A study of the effect of waterborne pressure on ultrasonic guided wave signals in pipelines
胡晓谍 1林霆威 1张维煊 1魏子麒 2王奕首1
作者信息
- 1. 厦门大学航空航天学院 厦门 361005
- 2. 中国科学院自动化研究所 北京 110007
- 折叠
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.
关键词
管道/超声导波/水载压力/半解析有限元Key words
pipe/ultrasonic guided wave/water load pressure/semi-analytical finite element引用本文复制引用
基金项目
国家重点研发计划(2023YFF0716602)
国家重点研发计划(2019YFC0312404)
出版年
2024
NETL
NSTL
万方数据