基于超声导波的压力容器健康监测II：定位精度的影响因素

doi:10.3901/JME.2020.08.133

机械工程学报 ›› 2020, Vol. 56 ›› Issue (8): 133-140.doi: 10.3901/JME.2020.08.133

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基于超声导波的压力容器健康监测II：定位精度的影响因素

杨斌, 胡超杰, 轩福贞, 罗承强, 项延训, 肖飚

华东理工大学机械与动力工程学院上海 200237

收稿日期:2019-08-06 修回日期:2019-12-05 出版日期:2020-04-20 发布日期:2020-05-28
通讯作者: 轩福贞(通信作者),男,1970年出生,博士,教授,博士研究生导师。主要研究方向为智能传感与先进健康监测技术。E-mail:fzxuan@ecust.edu.cn
作者简介:杨斌,男,1988年出生,博士,讲师,硕士研究生导师。主要研究方向为复合材料压力容器的力学性能及健康监测。E-mail:yangbin@ecust.edu.cn
基金资助:
青年人才托举工程（2018QNRC001）、国家自然科学基金（11702097，51835003）、国家重点研发计划（2018YFC0808800）和中央高校基本科研业务费（222201714015）资助项目。

Structural Health Monitoring of Pressure Vessel Based on Guided Wave Technology. Part II: Damage Localization Accuracy Influencing Factors

YANG Bin, HU Chaojie, XUAN Fuzhen, LUO Chengqiang, XIANG Yanxun, XIAO Biao

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237

Received:2019-08-06 Revised:2019-12-05 Online:2020-04-20 Published:2020-05-28

摘要/Abstract

摘要： 基于超声导波的压力容器健康监测研究的第二部分，主要考察影响压力容器损伤定位精度的因素。重点研究PZT压电片阵列形式、激发频率、缺陷位置及稀疏度对压力容器缺陷定位精度的影响规律。为分析既定试验阵型的稀疏度对压力容器封头和筒体缺陷定位精度的影响，提出降低入射波幅值来模拟导波在不同直径、轴长的压力容器中传播的方法，并试验验证该方法的可行性。研究结果表明，对于直径为325 mm的压力容器封头，沿圆周均匀布置8片PZT压电片、顶点布置1片PZT的阵列形式的缺陷定位精度最高；当激发频率为210 kHz和220 kHz时，算法对压力容器封头的定位误差最小，有效比率最高；压力容器封头中缺陷的径向位置对定位精度影响很小，算法对位于传感器连线上的径向缺陷定位精度最高；试验结果与采用降低入射波幅值的方法对大直径、长轴压力容器的缺陷定位结果接近，当导波传播距离特征值所对应的A0导波幅值小于5时，传感器阵列过于稀疏而导致缺陷定位精度快速降低。

关键词: 压力容器, 定位精度, 健康监测, 影响因素, 损伤定位

Abstract: The second part of the guided wave based structural health monitoring of pressure vessel mainly focuses on investigating the influencing factors of damage localization accuracy. The PZT array,excitation frequency, damage location, and distance between different PZT wafers on the damage localization accuracy of the pressure vessel are discussed. In order to analysis the PZT distance on the damage localization result of the head and cylinder section of the pressure vessel, we decrease the amplitude of incident wave to simulate the guided wave propagating in the pressure vessel with different diameters and axial lengths. The method is then verified by experimental results in the damage localization of the pressure vessel with different dimensions. Results show that the PZT array with 8 PZT on circumference and 1 PZT on the vertex of the head has the maximum accuracy for a vessel with diameter of 325 mm. The damage localization error is the minimum and the effective localization is the maximum when the wave frequency is 210 kHz and 220 kHz. The radial direction of the damage has less influence on the localization result, while the accuracy is higher when the damage is located on the excitation-receiver path. The experimental and computing results by the proposed method match well, and the damage localization accuracy decreasing sharply when the according A0 amplitude of the propagating distance is less than 5.

Key words: pressure vessel, damage localization accuracy, structural health monitoring, influencing factor, damage localization

中图分类号:

TG156

杨斌, 胡超杰, 轩福贞, 罗承强, 项延训, 肖飚. 基于超声导波的压力容器健康监测II：定位精度的影响因素[J]. 机械工程学报, 2020, 56(8): 133-140.

YANG Bin, HU Chaojie, XUAN Fuzhen, LUO Chengqiang, XIANG Yanxun, XIAO Biao. Structural Health Monitoring of Pressure Vessel Based on Guided Wave Technology. Part II: Damage Localization Accuracy Influencing Factors[J]. Journal of Mechanical Engineering, 2020, 56(8): 133-140.

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基于超声导波的压力容器健康监测II：定位精度的影响因素

Structural Health Monitoring of Pressure Vessel Based on Guided Wave Technology. Part II: Damage Localization Accuracy Influencing Factors

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