Measurement of flow-induced vibrations using a fiber Bragg grating sensor

Wei Jin; Y. Zhou; Peter K. C. Chan; H. G. Xu

doi:10.1117/12.335737

11 January 1999 Measurement of flow-induced vibrations using a fiber Bragg grating sensor

Wei Jin, Y. Zhou, Peter K. C. Chan, H. G. Xu

Proceedings Volume 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors; (1999) https://doi.org/10.1117/12.335737
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

A fiber-optic bragg grating sensor for flow-induced vibration measurement is described. The sensor is based on monitoring shift in the Bragg wavelength of a fiber Bragg grating. the fiber Bragg grating, when bonded onto a structure, can measure local axial strain variation of the structure. The strain can be related to the structural bending displacement. Experiments were conducted to measure the flow-induced vibration of a cylinder in a crossflow. The measurement results in terms of then natural frequency of the fluid-structure system and the vortex shedding frequency are consistent with the result obtained from a laser vibrometer. Fiber Bragg grating sensors have potential applications in the study of fluid-structure interactions of cylinder arrays in a crossflow.

Citation Download Citation

Wei Jin, Y. Zhou, Peter K. C. Chan, and H. G. Xu "Measurement of flow-induced vibrations using a fiber Bragg grating sensor", Proc. SPIE 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors, (11 January 1999); https://doi.org/10.1117/12.335737

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