The Energy Distribution Properties of the Guided Wave in the Underground Layered Pipeline Structure: Finite Element Simulation and Experimental Verification

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Li, Y.^1 ; Zhao, H.B.^1,2 ; Liu, S.B.^1,3 ; Zhang, J.N.^1,4 ; Ma, Y.^5

School of Architecture and Civil Engineering, Shenyang University, Shenyang

110044, China^1

NO.3 Engineering Co. Ltd., CCCC Third Harbor Engineering Co. Ltd, Nanjing

210011, China^2

CCCC-SHEC Third Highway Engineering Co. Ltd, Xi'an

710065, China^3

China Railway 17th Bureau Group Co. Ltd, Taiyuan

030006, China^4

Liaoning Enrollment and Examination Commission Office of Higher and Secondary Education, Shenyang

110031, China^5

关键词: Behaviour descriptions;    Energy distributions;    Excitation frequency;    Experimental system;    Finite element simulations;    Frequency dispersion;    Structural health monitoring (SHM);    Ultrasonic guided wave;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/6/062074/pdf
DOI  :  10.1088/1757-899X/392/6/062074

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Many layered pipe structures (LPSs) are covered under the soil, so it is important to investigate the guided wave propagation characteristics for underground LPSs in structural health monitoring (SHM). The paper aims to propose a finite element model to describe the ultrasonic guided wave propagation properties in (underground) layered pipeline. Firstly, a selection of suitable excitation frequency and mode of PZT-based guided waves is successfully finished. Secondly, finite element analysis (FEA) using ABAQUS software is applied to establish an (underground) layered pipe model with piezoceramic (PZT) transducers for generating the guided waves. The finite element analysis (FEA) results show that the soil have a significant impact on the generating modes. The analysis of reflection signal is difficult because of mode conversion. Thus, the energy method of guided wave is used in order to analyze properties of underground layer pipe. The soil impacts for layered pipe focus on the axial energy properties. Although a part of guided wave energy scatters into pipe layers even the soil which makes the behaviour 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 mentioned research, and the experimental and numerical results match well.