Analysis of VortexInduced Vibration of Marine Riser Under#br#  the Consideration of Prestress Force Distribution

Abstract

Abstract:

In present research, the problem of vortexinduced vibration (VIV) of marine riser structure with complex prestress force distribution is considered. Based on the EulerBernoulli beam theory, according to the stressstrain formula, differential equations of the influence with complex prestress force distribution on riser structure are established. At the end, a toptensioned riser (TTR) which is under shear flow loading is taken as an example, the influence of natural frequency, mode shape, and VIV response characteristic by complex prestress force distribution are investigated. The result shows that the distribution of complex prestress force has a significant influence on the riser structural dynamic characteristics, especially on the natural frequency. It is shown that the method proposed in this research provides a new approach to analyze the VIV problem of riser structure with complex loading.

Key words: riser structure, prestress, vortexinduced vibration (VIV), dynamic characteristics

CLC Number:

O 323
U 674

CHEN Luyun1,LI Leixin1, 2,YANG Nian1. Analysis of VortexInduced Vibration of Marine Riser Under#br# the Consideration of Prestress Force Distribution[J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 476-.

References

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Analysis of VortexInduced Vibration of Marine Riser Under#br# the Consideration of Prestress Force Distribution

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