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论文类型：期刊论文

发表时间：2014-09-01

发表刊物：SCIENCE CHINA-TECHNOLOGICAL SCIENCES

收录刊物：SCIE、EI

卷号：57

期号：9

页面范围：1714-1720

ISSN号：1674-7321

关键字：vortex-induced vibration (VIV); fiber Bragg grating (FBG); fatigue test; pipeline experiment; vibration control equipment

摘要：The vortex-induced vibrations (VIV) is an important topic of study in many different scientific and engineering fields. While VIV can be of benefit in some cases, oftentimes, it is an undesirable phenomenon that can be quite dangerous. In particular for offshore pipelines, VIV can lead to fatiguing of the pipe structure and can cause disastrous consequences if left unchecked. A number of different methods have been applied to the measurement of VIV, especially for the elongated, thin cylindrical structures. The use of fiber optic fiber Bragg gratings (FBGs) in particular has gained popularity over the recent years due to their distinct properties. However, FBGs are also very fragile and are susceptible to failure when placed in harsh environments without protection. In this paper, 56 FBGs encapsulated in stainless steel tubes were applied to the measurement of VIV in a 28-m model pipeline under controlled and uncontrolled conditions. Tests show that the encapsulated sensors possessed good sensitivity as well as fatigue life (> 80000 cycles). The measurements from FBGs were also high enough to allow frequency domain analysis of the pipeline VIV under the two conditions. The authors conclude that the encapsulated FBGs are a viable tool for the study of VIV in pipeline structures.