基于光纤光栅测试技术的隔水管力学行为实验研究

Experimental Study of the Drilling Riser Mechanical Behavior Based on Fiber Bragg Grating Measuring and Testing Technique

基于光纤光栅测试技术开展了隔水管力学行为的实验研究,运用相似理论确定了隔水管实验模型的基本参数。确定了光纤光栅传感器的布置方法。给出了基于光纤光栅测试技术的数据处理方法,开展了均匀流作用下的隔水管涡激振动实验研究。通过研究得到以下结论:光纤光栅测试技术可应用于隔水管力学行为实验研究中;实验条件下,流向的振动频率是横向的2倍,且横向的振幅明显比流向的振幅大。所应用的方法对于实验室研究隔水管力学行为实验具有重要意义。

We carry out experimental study on riser mechanical behavior based on fiber Bragg grating testing technology.The layout of fiber Bragg grating sensors is identified,and the basic parameters of riser experimental models are given by applying the similarity theory.The data processing method based on fiber Bragg grating testing technology is demonstrated.Riser vortex induced vibration experiments are carried out under the uniform flow and the results show that fiber Bragg grating technology can be applied to experimental study on riser mechanical behavior.The in-line vibration frequency is two times of the crossflow one under the experimental conditions and the in-line amplitude is significantly larger than the cross-flow one.This method has great significance for experimental study on riser mechanical behavior in laboratory.