顶张力立管涡激振动抑振装置性能比较(英文)

Performance Comparisons of Vortex-Induced Vibration Suppression Devices for Top Tensioned Riser

为降低甚至消除漩涡脱落引起的顶张力立管振动响应从而提高其疲劳寿命,设计了五种型式的涡激振动抑振装置, 并在中国海洋大学物理海洋实验室对装有抑振装置的模型立管进行了实验研究。得到了模型立管在几种不同流速下顺流向和横向涡激振动应变时程曲线,同时为了对比分析也测量了没有安装抑振装置的裸管的响应曲线。对比分析了三种外流流速下抑振装置对立管涡激振动响应的影响,结果表明各种抑振装置对立管顺流向和横向涡激振动幅值和频率都有不同程度的降低,但其影响和有效性各不相同。

In order to reduce and even eliminate the vibrations caused by vortex shedding and increase the fatigue life of the top tensioned risers（TTR）,five types of vortex-induced vibration（VIV） suppression devices were designed and the model experiments of risers equipped with suppression devices were carried out in the Physical Oceanography Laboratory of Ocean University of China.Time domain strain curves of in-line and transverse response of the model risers under the excitation of different current velocities were obtained and the corresponding model risers without suppression devices were also tested for comparison.Then the effects of the suppression devices at three different current velocities on the riser are analyzed and compared with each other.It is found that both the in-line and transverse oscillation amplitudes and frequencies of the riser with suppression devices are reduced at different degrees while their effect and efficiency on the suppression of the riser vibrations are different from each other.