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固定-铰接约束柔性管的涡激振动实验研究

朱红钧 刘文丽 高岳

朱红钧,刘文丽,高岳. 固定-铰接约束柔性管的涡激振动实验研究 [J]. 应用数学和力学,2023,44(2):141-151 doi: 10.21656/1000-0887.430320
引用本文: 朱红钧,刘文丽,高岳. 固定-铰接约束柔性管的涡激振动实验研究 [J]. 应用数学和力学,2023,44(2):141-151 doi: 10.21656/1000-0887.430320
ZHU Hongjun, LIU Wenli, GAO Yue. Experimental Study on the Vortex-Induced Vibration of Fixed-Hinged Flexible Risers[J]. Applied Mathematics and Mechanics, 2023, 44(2): 141-151. doi: 10.21656/1000-0887.430320
Citation: ZHU Hongjun, LIU Wenli, GAO Yue. Experimental Study on the Vortex-Induced Vibration of Fixed-Hinged Flexible Risers[J]. Applied Mathematics and Mechanics, 2023, 44(2): 141-151. doi: 10.21656/1000-0887.430320

固定-铰接约束柔性管的涡激振动实验研究

doi: 10.21656/1000-0887.430320
基金项目: 国家自然科学基金(面上项目)(51979238)
详细信息
    作者简介:

    朱红钧(1983—),男,教授,博士,博士生导师(通讯作者. E-mail:ticky863@126.com

  • 中图分类号: TE973

Experimental Study on the Vortex-Induced Vibration of Fixed-Hinged Flexible Risers

  • 摘要:

    海洋立管顶部常铰接于浮式平台下方,在海流激励下存在涡激振动响应,潜在疲劳失效的风险。该文采用非介入光学测试方法(高速摄像),对布置于循环水槽中顶部铰接-底部固定的悬链线柔性立管进行了振动响应研究。实验结果表明,立管三个方向被激发的振动模态阶数与主导振动频率均随约化速度的增加而逐渐升高,平面外的最大均方根振幅在模态过渡时有先降后升的变化,与振动模态分支相呼应。流体与立管之间能量传递在不同方向的分布存在一定差异,导致不同步的模态过渡现象。平面内振动存在与平面外振动主导频率吻合的频率,根据其是否主导对应管段的平面内振动,将其分为强耦合和弱耦合两种模式。

  • 图  1  实验布置示意图

    注 为了解释图中的颜色,读者可以参考本文的电子网页版本,后同。

    Figure  1.  Schematic diagram of the experimental set-up

    图  2  实验后处理示意图

    Figure  2.  Schematic diagram of the image post-processing method

    图  3  柔性立管在三个方向上的前四种模态形状

    Figure  3.  The 1st 4 modal shapes of the flexible riser in the 3 directions

    图  4  立管振动的最大均方根振幅及对应位置主导频率随约化速度的变化趋势

    Figure  4.  Variations of the maximum root mean squared amplitude and the dominant frequency with the reduced velocity

    图  5  立管平面内振动从二阶向三阶过渡时代表性约化速度的均方根振幅和能量的时空变化

    Figure  5.  Spatio-temporal variations of the root-mean-square amplitude and energy transfer in the curvature plane at representative reduced velocities in the shift from the 2nd- to the 3rd-order vibration mode

    图  6  立管振动位移的时空演变和代表性标记圈的主导频率:(a) 平面外;(b) 平面内的X方向;(c) 平面内的Z方向

    Figure  6.  Spatio-temporal evolution of the vibration displacement and the dominant frequency at representative markers: (a) out-of-plane; (b) in-plane, X-direction; (c) in-plane, Z-direction

    图  7  立管振动的均方根振幅及主导频率在空间上的分布

    Figure  7.  Spatial variations of the root-mean-square amplitude and the dominant frequency

    图  8  立管振动包络图及振动频率

    Figure  8.  Instantaneous vibration profiles and associated frequencies

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出版历程
  • 收稿日期:  2022-10-11
  • 修回日期:  2023-01-03
  • 网络出版日期:  2023-02-03
  • 刊出日期:  2023-02-15

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