柔性立管涡激振动实验的数据分析

在对光纤光栅应变计（FBG）测量得到的柔性立管室内模型实验数据进行分析中，通过信号滤波、模态分解、频谱分析以及位移计算等得到立管涡激振动的共振模态、振动频率和位移变形等参数的变化规律。分析结果表明所采用的数据分析方法能够很好地分析出柔性立管涡激振动的基本特性，这对今后深入开展深海立管涡激振动问题的实验研究和现场原位测试提供了有益的借鉴。

ANALYSIS ON THE VORTEX-INDUCED VIBRATIONS EXPERIMENTAL RESULTS OF FLEXIBLE RISERS

Analysis the indoor model experimental results of the flexible risers surveyed by Fiber Bragg Grating （FBG）. Base the band-pass filtering, modal decomposition, spectrum analysis and displacement calculation and so on, the change regulation of parameters which the resonant mode, vibration frequency and displacement distortion of vortex-induced vibrations （VIV） could be given in the experimentation. The results shows that the basic characteristics of flexible risers could be analyzed by data analysis methods, and this will be availability to the test researches of deepwater flexible risers VIV＇s problems and local origin test in the future.