基于光纤光栅传感器的细长柔性立管涡激振动响应实验

Application of the fiber bragg grating sensors in laboratory tests of the vortex-induced vibration of a long flexible riser

涡激振动是导致深海柔性立管发生疲劳破坏的重要因素。利用光纤光栅传感器进行了细长柔性立管涡激振动响应实验,并结合部分实验结果对应变信号的时间变化、应变频谱、位移时间历程及位移均方根的空间分布进行了分析,得出了细长柔性立管模型在均匀流作用下的一些重要涡激振动响应特性,可为今后进一步的研究工作提供参考。

Vortex-induced vibration（VIV） is an important factor accounted for the fatigue damage of the deep water flexible risers.This work introduced the Fiber Bragg Grating（FBG） sensors to detect the vortex-induced vibration experimental response.Combining the experimental results of the strain traces,strain spectrums,time history of the displacements and spatial distributions of the Root-Mean Squared（RMS） displacements,the dynamic response characteristics of the long flexible riser subjected to vortex-induced vibration under uniform flows were obtained.This will provide a reference for the continuous research work.