中国海洋大学学报（自然科学版）2012，Vol.42Issue(6)：126-132,7.
海洋立管抑振装置优化布置的实验研究
Experimental Investigation on Optimized Arrangement of Suppression Devices of Marine Riser
摘要
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 fa-tigue 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.关键词
海洋立管/涡激振动/抑振/覆盖率/疲劳寿命Key words
marine riser/ vortex-induced vibration (VIV)/ VIV suppression/ coverage rate/ fatigue life分类
数理科学引用本文复制引用
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):126-132,7.基金项目
国家高技术研究发展计划项目(2010AA09Z303) （2010AA09Z303）
国家自然科学重点基金项目(50739004)资助 （50739004）
