Ultrasonic guided wave propagation properties for underground layered pipeline structures

摘要：

　　Ultrasonic guided wave ppropagation pproperties are used as a theoretical foundation for the damage detection(DD)and structural health monitoring(SHM)of underground layered pipelines.The paper aims at proposing a finite element model to describe the ultrasonic guided wave propagation properties.Dispersion equations are theoretically established and numerically solved based on the Navier-Stokes equations,combining with additional displacement field equations.Finite element method(FEM)using ABAQUS software is applied to establish the underground layered pipe model with piezoceramic transducers(PZT)for generating and receiving the guided waves.A selection of suitable excitation frequency and mode of PZT-based guided waves is successfully finished.The finite element analysis(FEA)results show that although a part of guided wave energy scatters into pipe layers even the soil which makes the behavior description much more complicated,the remained guided wave energy is still sufficient enough for propagating in the pipe with the obvious frequency dispersion and mode conversion.An experimental system is established to verify the theoretical research,and the experimental and numerical results match well.

关键词： Ultrasonic guided waves underground layered pipelines propagation properties piezoceramic transducers energy ratio

作者: Y.Li S.Yan B.W.Zhang Y.Ma

作者单位: School of Civil and Hydraulic Engineering,Dalian University of Technology,Dalian,China;School of Civ School of Civil and Hydraulic Engineering,Dalian University of Technology,Dalian,China;School of Civ School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China Liaoning Enrollment and Examination Commission Office of Higher and Secondary Education,Shenyang,Chi

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 1474-1483

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）