摘要
基于模态分析理论,对柔性立管模型进行了涡激振动试验测试技术研究。对立管表面应变片的布置进行了设计,在模型试验中应用光纤光栅传感器对立管模型的应变时历进行了测量,并据此计算得到了柔性立管模型的位移时间历程和加速度时间历程。试验对立管振动的加速度进行了测量,通过两个加速度时间历程的相互对比分析及与理论计算结果的对比,验证了光纤光栅技术进行柔性立管涡激振动试验的可行性及可靠性。
The vibration of a tensioned flexible riser model is tested to verify the measuring technique which will be used for the vortex induced vibration model test.The numbers and locations of the strain gauges are firstly determined according to modal analysis theory.Then the Fiber Bragg grating sensors are innovatively used to acquire the strain signal time history,by which the time dynamic displacement time history and acceleration time history along the model are calculated.Meanwhile,the acceleration information along the model is acquired.The two dynamic accelerations are finally compared with each other and the theoretical results.The results show the feasibility of the Fiber Bragg technique using in the VortexInduced-Vibration model test.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2011年第6期728-732,812,共5页
Journal of Vibration,Measurement & Diagnosis
基金
国家高技术研究发展计划("八六三"计划)资助项目(编号:2008AA09A105-6)
中海油-上海交通大学"深水工程技术研究中心"资助项目
江苏省船舶先进设计制造技术重点实验室资助项目
关键词
涡激振动
模态分析
模型试验
光纤光栅
vortex-induce vibration modal analysis model experiment Fiber Bragg grating sensor
