Numerical Simulation and Experimental Investigation on Ultrasonic Guided Waves in Multilayered Pipes Based on SAFE
Numerical Simulation and Experimental Investigation on Ultrasonic Guided Waves in Multilayered Pipes Based on SAFE
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DOI：
10.3901/jme.2014.08.010
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发表时间：
2014
影响因子：
--
通讯作者：
Zhang Xiao-we
中科院分区：
文献类型：
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作者：
Zhang Xiao-we
超声导波检测技术以其检测距离远、检测效率高等优点，在工业管道的无损检测和健康监测中显示出良好的前景，但对多层管道导波检测的研究却很少，而导波检测在工业领域应用广泛。基于虚功原理，采用半解析有限元法建立了导波在多层管道中传播的控制方程，通过求解控制方程提取了导波的相速度、能量速度、衰减和波结构等色散特性，为应用过程中模式和频率的选择提供了依据。考虑粘弹性材料对导波在多层管道中传播的影响，以衰减曲线的形式得到了多层管道的色散解，可用于监督多层管道的检测，并通过数值模拟以及MSGW导波仪对单层管道和内衬塑料管的检测，对理论结果进行了部分验证。
Ultrasonic guided waves detecting technology has shown a good prospect in non-destructive testing and health monitoring of industrial pipelines, thanks to its advantages such as long detection range and high detection efficiency, but very few researches have been conducted on guided waves inspection of multilayered pipes, which is widely used in industrial circle. The semi-analytical finite element method is used to formulate the governing equation for guided waves propagating in multilayered pipes on the basis of the virtual work principle, dispersive characteristics including phase velocity, energy velocity, attenuation and wave structures are extracted by solving governing equation, which provide the basis for selecting mode and frequency during application. The effect of viscoelastic material on guided waves propagating in multilayered pipes is taken into consideration, and the dispersive solutions for multilayered pipes are obtained in terms of attenuation curves, which can be used to supervise the inspection of multilayered pipes, furthermore, the theoretical result is partly verified by numerical simulation as well as detecting single-layered pipe and lining plastic pipe by using MSGW guided waves detecting instrument.