Research on defect detection in double-casing tube with layers of different materials via PEC

ZHANG Chao; LI Yong; YAN Bei; LIU Zhengshuai; CHEN Zhenmao

doi:10.13873/j.1000-9787(2019)11-0008-03

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Research on defect detection in double-casing tube with layers of different materials via PEC

更新时间：2025-09-11

- Research on defect detection in double-casing tube with layers of different materials via PEC
- Issue 11, Pages: 8-10+14(2019)
- 作者机构：
  
  西安交通大学机械结构强度与振动国家重点实验室陕西省无损检测与结构完整性评价工程技术研究中心
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-9787(2019)11-0008-03
  CLC： TG115.28
- Published：2019
- 稿件说明：
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ZHANG Chao, LI Yong, YAN Bei, et al. Research on defect detection in double-casing tube with layers of different materials via PEC[J]. 2019, (11): 8-10+14.
DOI：

ZHANG Chao, LI Yong, YAN Bei, et al. Research on defect detection in double-casing tube with layers of different materials via PEC[J]. 2019, (11): 8-10+14. DOI： 10.13873/j.1000-9787(2019)11-0008-03.

摘要

双层异质金属套管因其结构集成了内管与外管的优良机械力学性能

在工程领域中得到了广泛应用。在制备和服役过程中

双层异质金属套管会出现诸如壁厚减薄等结构缺陷

影响套管完整性及运行安全性。鉴于此

针对双层异质金属套管

系统探究基于脉冲涡流检测的壁厚减薄缺陷分类识别及定量评估方法。建立了快速有限元仿真模型

通过系列仿真分析

提出检测信号特征

构建其与壁厚减薄量间的映射关系

并以此为依据

提出了缺陷识别与定量评估手段。同时

搭建了脉冲涡流检测实验系统

通过实验研究

验证了所提出的双层异质金属套管壁厚减薄缺陷分类识别及定量评估方法的有效性。

Abstract

The double-casing tube（DCT） of different materials is widely adopted in engineering fields due to its excellent mechanical characteristics of inner and outer tubes. During fabrication and practical service process

DCT is subject to structural flaws particularly the wall-thinning defect（WTD）. Such defect undermines the structural integrity and safety of DCT. In light of this

classification and evaluation of WTD in DCT via PEC is intensively investigated. A fast finite element model is built up for simulations of testing signals. Through simulations

deteeting signal features is proposed. Mapping relationship between the signal feature and wall thickness thinning ratio is established. Based on this

the method for defect recognition and quantitative evaluation of WTD is proposed. At the same time

in parallel

a PEC detection system is set up. The validity of the proposed method for WTD classification recognition and quantitative assessment is verfied through experimental research.

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