Monitoring pipe wall integrity using fiber Bragg grating-based sensing of low-frequency guided ultrasonic waves

被引：14

作者：

Ray, Pabitro ^{[1
,2
,3
]}

Srinivasan, Balaji ^{[1
]}

Balasubramaniam, Krishnan ^{[2
,3
]}

Rajagopal, Prabhu ^{[2
,3
]}

机构：

[1] Indian Inst Technol Madras, Dept Elect Engn, Madras 600036, Tamil Nadu, India

[2] Indian Inst Technol Madras, Ctr Nondestruct Evaluat, Madras 600036, Tamil Nadu, India

[3] Indian Inst Technol Madras, Dept Mech Engn, Madras 600036, Tamil Nadu, India

来源：

ULTRASONICS | 2018年 / 90卷

关键词：

Fiber Bragg grating; Annular cylinders; Feature-guided waves; Pipe eccentricity; Structural health monitoring; STRAIN-MEASUREMENTS; BENDS; SCATTERING; INSPECTION; MODE;

D O I：

10.1016/j.ultras.2018.06.009

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Recent literature shows that low-frequency ultrasonic guided waves experience mode confinement and loss of axi-symmetry in pipes with axially uniform features such as eccentricity. Considering extended wall loss as a case of uniform eccentricity, this paper proposes to monitor pipe integrity by measuring changes to the modal structure of low-frequency axisymmetric L(0,2) longitudinal guided waves. Fiber Bragg gratings are shown to be effective in detecting changes to L(0,2) modal characteristics, providing a novel route to health monitoring of pipe assets.

引用

页码：120 / 124

页数：5

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