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Nonlinear response of a moored buoy

机译:系泊浮标的非线性响应

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摘要

The nonlinear dynamic analysis of a multipoint slack moored buoy is performed under the action of first and second order wave forces. The nonlinearity of the system is caused by the geometric nonlinearity of the mooring lines. The resulting nonlinear equation of motion is solved by an incremental time marching scheme. The nonlinear responses of the system are analysed to investigate different kinds of dynamic instability phenomena that may arise due to the nonlinearity of the system. As an illustrative example, a hollow cylindrical buoy anchored to the sea bed by means of six slack mooring lines is considered. The responses of the system are obtained and analysed for three regular waves namely, 5 m/5 s, 12 m/10 s and 18 m/15 s. The results of the study show that different kinds of instability phenomena like nT subharmonic oscillations, symmetry breaking bifurcation and aperiodic responses may occur in slack mooring systems. Further, a second order wave force may considerably influence the dynamic stability of such systems.
机译:在一阶和二阶波浪力的作用下,对多点松弛系泊浮标进行了非线性动力学分析。系统的非线性是由系泊缆的几何非线性引起的。最终的非线性运动方程通过增量时间行进方案求解。分析了系统的非线性响应,以研究由于系统的非线性而可能出现的各种动态不稳定性现象。作为说明性示例,考虑了通过六个松弛的系泊缆线锚定到海床的空心圆柱形浮标。获取并分析了三个规则波的系统响应,即5 m / 5 s,12 m / 10 s和18 m / 15 s。研究结果表明,在松弛的系泊系统中,可能会出现不同种类的不稳定性现象,例如nT次谐波振荡,对称破坏分叉和非周期性响应。此外,二阶波动力可能会大大影响此类系统的动态稳定性。

著录项

  • 来源
    《Ocean Engineering》 |2003年第13期|p.1625-1646|共22页
  • 作者

    A. Umar; T.K. Datta;

  • 作者单位

    Department of Civil Engineering, Aligarh Muslim University, Aligarh 202002, India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋学;
  • 关键词

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