摘要
通过数值模拟方法分析对比了质量比为2及质量比为10的立管在约化速度3~14的双自由度涡激振动特性。质量比为2的圆柱具有更宽的锁定区间,且相同约化速度下横向振幅更大。从振动轨迹可以看出,质量比为2的立管在锁定区间内顺流向振动振幅不可忽略,在锁定区间外顺流向振动极小。质量比为10的立管在锁定区间内顺流向振动极小,锁定区间外顺流向振动振幅不可忽略。
Two-freedom VIV by numerical simulation are investigated in this paper. The computation is carried out for reduced velocities in the range 3≤U≤14 and mass ratios=2,10. The lockin region of mass ratio 2 is wider than that of mass ratio 10. The amplitudes of cross flow of mass ratio 2 are larger than that of mass ratio 10 at the same reduced velocities. The in-line flow vibra- tion can＇t be neglected in lock-in region for mass ratio 2. On the contrary,the in-line flow amplitude reaches the same magnitude of cross flow amplitude out of the lock-in region.
出处
《石油矿场机械》
2016年第5期13-19,共7页
Oil Field Equipment
基金
国家重点基础研究发展计划(973计划)"深海柔性结构的非线性流固耦合与破坏机理研究"(2011CB013702)
