抑制涡激振动的螺旋列板设计参数研究

Helical strakes for marine risers VIV suppression and its design parameters selection

基于水池模型实验结果和工程设计经验,结合国内外试验数据,着重分析用于抑制海洋立管涡激振动的螺旋列板几何参数(鳍高和螺距)及覆盖率对立管涡激振动的影响;并对水动力直径和水动力系数的选取对预报涡激振动的影响进行了分析,进而提出了适合于海洋立管工程应用的螺旋列板几何和设计参数选取的建议,为螺旋列板工程应用、海洋立管强度和疲劳设计提供参考。

Based on joint project experiment results and design experience,covering ratio,the effecs of geometric parameters,hydrodynamic coefficients and marine growth on the risers VIV suppression efficiency have been mainly analyzed,comparing with the published experiment data.Furthermore,some reasonable options for the geometric parameters and hydrodynamic coefficient selection of helical strakes have been suggested.It provides a valuable reference to helical strakes application and riser strength and fatigue design.