The Vortex-Induced Vibration (VIV) test system on deepwater riser based on Bare Fiber Bragg Grating (BFBG) sensor technology was designed. Meanwhile, a riser VIV response numerical model was established based on the work-energy principle. The results show that the first-order vibration frequency dominates the vibration of the riser, and as the velocity increases, the dominant frequency of the riser gradually increases under the effect of different top tensions. At the same velocity, as the top tension increases step by step, the dominant frequency and fatigue damage at the same position along the axial length of the riser both gradually decreases. The model test and numerical simulation show a relatively consistent change, maintaining a high degree of agreement. The process control system based on BFBG of model test has excellent performance, and FBG sensors have great advantages in VIV test of a vertical riser in water.

设计了基于裸光纤布拉格光栅（BFBG）传感器技术的深水立管涡激振动（VIV）测试系统。同时，基于功能原理建立了立管VIV响应数值模型。结果表明，一阶振动频率主导立管的振动，随着速度的增加，立管的主频在不同的顶部张力的作用下逐渐增大。以相同的速度，随着顶部张力逐步增加，沿立管轴向长度的相同位置的主频和疲劳损伤都逐渐减小。模型测试和数值模拟显示相对一致的变化，保持高度一致性。基于模型测试的BFBG的过程控制系统具有出色的性能，