作者：孙加伟1, 王晶2, 黄三傲1,3
作者单位：1. 中广核检测技术有限公司，江苏 苏州 215004;
2. 南京信息职业技术学院电子信息学院，江苏 南京 210023;
3. 北京科技大学钢铁共性技术协同创新中心，北京 100083
关键词：管道结构;损伤检测;导波;双点传感;无基准
摘要：
核电石油化工等领域中的管道结构缺陷监测是关系到系统整体性安全的重要环节，也是结构健康监测领域的研究热点。管道结构中的超声导波传播复杂，损伤监测与检测难度大。研究双点法管道结构缺陷的无基准监测方法，采用单点激励下的等效双点传感信号响应对称性，消除导波多模、频散以及多径效应带来的影响，分析提取出损伤引起的信号变化，从而确定损伤特征参数，进而实现损伤的无基准检测。在典型钢管道结构上的实验验证表明，该方法在合适的中心频率下可通过实测结构响应信号对，实现无基准损伤定位和检测，实现较为便捷，对于实际工程应用具有较好的意义。
Guided wave and two-point sensing based non-benchmark pipeline structural damage detection
SUN Jiawei1, WANG Jing2, HUANG San’ao1,3
1. CGN Inspection Technology Co., Ltd., Suzhou 215004, China;
2. Department of Electronic and Information, Nanjing Vocational College of Information Technology, Nanjing 210023, China;
3. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Abstract: Pipeline structure is one of the most important parts in engineering structures, such as nuclear plants, and its fault monitoring is also important for the safety of the working system. Thus, Pipeline structural health monitoring is a research hotspot in the field of structural health monitoring. Guided wave based pipeline damage detection is usually difficult due to the complicated propagation of guided wave. Guided wave and two-point sensing based baseline free pipeline structural damage detection is proposed and researched in this paper. The equivalent two-point sensing signal response symmetry under single excitation is adopted to eliminate the influence of multi-mode, dispersion and multi-path effect in guided wave propagation. The signal changes caused by damage are analyzed and extracted, so as to determine the damage characteristic parameters, and then to realize the non-benchmark damage monitoring. The experimental verification on typical steel pipe structure showed that the method can realize the base line free damage location and detection through the measured structural response pairs under the appropriate center frequency, which is convenient and has certain significance for practical engineering application.
Keywords: pipeline structure;damage detection;guided wave;two-point sensing;non-benchmark
2021, 47(10):103-108 收稿日期: 2021-04-21;收到修改稿日期: 2021-05-10
基金项目: 国家重点研发计划(2018YFF01012902)；南京信息职业技术学院院级基金重点项目（YK20160102）
作者简介: 孙加伟（1979-），男，天津市人，高级工程师，硕士，研究方向为先进无损检测技术与装备
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