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A vortex-induced vibration model for the fatigue analysis of a marine drilling riser

机译：用于海洋钻探立管疲劳分析的涡激振动模型

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摘要

The objective is to propose a quick and accurate vortex-induced vibration (VIV) model to predict the fatigue life of marine drilling risers. The nonlinear wake oscillator model was applied to represent the lift force, which is described by a fourth-order partial differential equation set. Next, we adopted the generalised integral transform technique (GITT) to transform it into second-order ordinary differential equation system, which was solved by the Runge-Kutta method. Validation of the numerical model was implemented and a good agreement was achieved. Next, an S-N curve was adopted to conduct fatigue prediction. The results demonstrate that under the conditions set forth in this paper, an increase in the current and outer diameter could reduce fatigue life, except when the outer diameter reaches a certain value, at which point the tendency is reversed. Moreover, when the top tension coefficient reaches a certain value, the fatigue life tendency is also reversed.
机译：目的是提出一种快速准确的涡激振动（VIV）模型，以预测船用钻井冒口的疲劳寿命。应用非线性尾波振荡器模型来表示升力，该模型由四阶偏微分方程组描述。接下来，我们采用广义积分变换技术（GITT）将其变换为二阶常微分方程组，并通过Runge-Kutta方法对其进行了求解。对数值模型进行了验证，并取得了良好的共识。接下来，采用S-N曲线进行疲劳预测。结果表明，在本文所述的条件下，电流和外径的增加会降低疲劳寿命，除非外径达到一定值时，这种趋势会逆转。此外，当最高张力系数达到一定值时，疲劳寿命趋势也相反。

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  • 来源
    《Ships and offshore structures》 |2017年第1期|280-287|共8页
  • 作者

    Jing Xu; Dongshi Wang; Hui Huang; Menglan Duan; Jijun Gu; Chen An;

  • 作者单位

    Institute for Ocean Engineering, China University of Petroleum-Beijing, Beijing, China;

    COSLDrilling, China Oilfield Services Ltd.(COSL), Beijing, China;

    The Petroleum Exploration and Production Research institute, SINOPEC, Beijing, China;

    Institute for Ocean Engineering, China University of Petroleum-Beijing, Beijing, China;

    Institute for Ocean Engineering, China University of Petroleum-Beijing, Beijing, China;

    Institute for Ocean Engineering, China University of Petroleum-Beijing, Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    marine drilling riser; viv; gitt; fatigue life;

    机译：船用立管;viv;提供;疲劳寿命;

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