| 海洋立管抑振装置优化布置的实验研究 |
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| 引用本文： | 郭海燕,李相环,张永波,李效民,李朋.海洋立管抑振装置优化布置的实验研究[J].中国海洋大学学报(自然科学版),2012,42(6):126-132. |
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| 作者姓名： | 郭海燕 李相环 张永波 李效民 李朋 |
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| 作者单位： | 中国海洋大学工程学院,山东青岛,266100 |
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| 基金项目： | 国家高技术研究发展计划项目，国家自然科学重点基金 |
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| 摘 要： | 设计1种梯形截面的三螺旋导板抑振装置,在实验室大型水槽进行海洋立管涡激振动实验.通过改变这种抑振装置的覆盖方式和覆盖范围,研究梯形截面螺旋导板的不同覆盖方式和覆盖范围对抑制海洋立管涡激振动的作用.实验时用动态电阻应变仪采集立管模型横向和顺流向的动态响应数据,并利用雨流计数法对模型进行疲劳分析.实验结果表明:在外流流速相同的条件下,三螺旋导板各种覆盖方案对涡激振动都有抑制作用;随着螺旋导板覆盖率的增加,立管的振动减弱,疲劳寿命增加；覆盖螺旋导板的立管顺流向振动频率明显降低,横向振动频率当覆盖率较高时有所降低,覆盖率较低时基本没有变化.
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| 关 键 词： | 海洋立管 涡激振动 抑振 覆盖率 疲劳寿命 |
Experimental Investigation on Optimized Arrangement of Suppression Devices of Marine Riser |
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| GUO Hai-Yan
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LI Xiang-Huan
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ZHANG Yong-Bo
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LI Xiao-Min
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LI Peng.Experimental Investigation on Optimized Arrangement of Suppression Devices of Marine Riser[J].Periodical of Ocean University of China,2012,42(6):126-132. |
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| Authors: | GUO Hai-Yan LI Xiang-Huan ZHANG Yong-Bo LI Xiao-Min LI Peng |
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| Institution: | (College of Engineering,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | One type of three-start helical strakes of trapezoidal cross section was designed and the VIV experiment was conducted in the large flume of the laboratory.The effect of different strake coverage length and the form of coverage on suppressing VIV was studied.Both In-line and Cross-flow data of dynamic responses were obtained by resistance strain gage instrumentation from the experiment and the fatigue life of riser is analyzed by rain flow count method.The experimental results indicate that with the same current speed,each condition of coverage length can suppress VIV,and as the rate of coverage increase,the vibration of marine riser decrease and the fatigue life increase.The In-line vibration frequency of marine riser covered with helical strakes decreases.When marine riser covered with helical strakes of high coverage rate,the Cross-flow vibration frequency decreases.When marine riser covered with helical strakes of low coverage rate,the Cross-flow vibration frequency is almost the same as that of a bare riser. |
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| Keywords: | marine riser vortex-induced vibration(VIV) VIV suppression coverage rate fatigue life |
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