Application of Helical Strakes for Suppressing the Flow-Induced Vibration of Two Side-by-Side Long Flexible Cylinders

Xu, Wanhai; Yang, Meng; Ai, H. X.; He, Ming; Li, Muhan

doi:10.1007/s13344-020-0017-5

Cited by 6 publications

(1 citation statement)

References 40 publications

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“…For offshore engineering, the vortex-induced vibration is one of the main causes of the fatigue damage to the riser [1], and helical strakes are regarded as one of the common methods in VIV suppression [2,3]. The suppression efficiency, on the one hand, is significantly high compared with other methods [4], while the additional load caused by the sea current is one of the main disadvantages for the strakes [5].…”

Section: Introductionmentioning

confidence: 99%

Scaled model testing for the helical strakes in reducing the vortex-induced vibrations

Sun

et al. 2023

J. Phys.: Conf. Ser.

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The accuracy of the prediction of the suppression efficiency of the triplex helical strakes for vortex-induced vibrations (VIV) is important in the offshore industry for the risers. Towing tank tests of the 1:1 section model have been used in the study of one degree of freedom; however, this method requires a long time for both the preparation and the testing. In this study, a scaled model testing method based on the flume and the oscillating frame is proposed, which measured the oscillating amplitude and the forces for both the bare pipe and the triplex helical strakes. The scaled tests were carried out in the TU Delft, with the range of Reynolds number between 6000 and 20000. The results were compared with the real model test applied in the towing tank to evaluate the accuracy. The measured strake efficiency of the scale model test agrees with the full-scale model test, providing support for the scaled model test in reducing the vortex-induced vibrations.

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Section: Introductionmentioning

confidence: 99%

Scaled model testing for the helical strakes in reducing the vortex-induced vibrations

Sun

et al. 2023

J. Phys.: Conf. Ser.

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A Review on Vibration Control of Multiple Cylinders Subjected to Flow-Induced Vibrations

Xu,

2024

China Ocean Eng

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The fatigue damage caused by flow-induced vibration (FIV) is one of the major concerns for multiple cylindrical structures in many engineering applications. The FIV suppression is of great importance for the security of many cylindrical structures. Many active and passive control methods have been employed for the vibration suppression of an isolated cylinder undergoing vortex-induced vibrations (VIV). The FIV suppression methods are mainly extended to the multiple cylinders from the vibration control of the isolated cylinder. Due to the mutual interference between the multiple cylinders, the FIV mechanism is more complex than the VIV mechanism, which makes a great challenge for the FIV suppression. Some efforts have been devoted to vibration suppression of multiple cylinder systems undergoing FIV over the past two decades. The control methods, such as helical strakes, splitter plates, control rods and flexible sheets, are not always effective, depending on many influence factors, such as the spacing ratio, the arrangement geometrical shape, the flow velocity and the parameters of the vibration control devices. The FIV response, hydrodynamic features and wake patterns of the multiple cylinders equipped with vibration control devices are reviewed and summarized. The FIV suppression efficiency of the vibration control methods are analyzed and compared considering different influence factors. Further research on the FIV suppression of multiple cylinders is suggested to provide insight for the development of FIV control methods and promote engineering applications of FIV control methods.

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Thermal and vibratory response of sprung square cylinder with four nature-inspired fin-shaped bumps

Rabiee

Farahani

Mosavi

2023

Ain Shams Engineering Journal

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Application of Helical Strakes for Suppressing the Flow-Induced Vibration of Two Side-by-Side Long Flexible Cylinders

Cited by 6 publications

References 40 publications

Scaled model testing for the helical strakes in reducing the vortex-induced vibrations

Scaled model testing for the helical strakes in reducing the vortex-induced vibrations

A Review on Vibration Control of Multiple Cylinders Subjected to Flow-Induced Vibrations

Thermal and vibratory response of sprung square cylinder with four nature-inspired fin-shaped bumps

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