钢质缓波型立管安装转移过程中的非线性力学响应
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Nonlinear Mechanical Response of Steel Lazy-Wave Riser During Installation and Transfer
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    摘要:

    基于最小势能原理,采用将整个立管视为一个单一连续管段的研究方法,研究钢质缓波型立管安装转移过程中的非线性力学响应。该方法无须将整个立管分段进行独立研究,可简单有效处理立管-海床相互作用,避免接触探测的复杂性,对新载荷、约束或边界条件的适应非常灵活,能够提高深水立管设计应用中的数值计算效率。研究发现:立管在向水平跨距减小的转移过程中,上拱点和下垂点的高度先降低后增高,而拱弯高度先增高后降低;悬挂点处的张力不断减小,然后增大,而悬挂点处的倾角变化较小。该数值分析结果对于深水钢质缓波型立管的设计具有一定的参考价值。

    Abstract:

    Based on the principle of minimum potential energy, the nonlinear mechanical response of steel lazy-wave riser during installation and transfer is studied by taking the whole riser as a single continuous pipe section. This method does not need to study the whole riser separately, can simply and effectively deal with the riser-seabed interaction, avoids the complexity of contact detection, is very flexible to adapt to new loads, constraints or boundary conditions, and can improve the numerical calculation efficiency in the design and application of deepwater riser. It is found that: the height of the upper arch point and sag point first decreases and then increases, while the arch bending height first increases and then decreases in the process of the transfer of the riser to the reduction of the horizontal span; the tension at the suspension point decreases and then increases, while the inclination at the suspension point changes very little. The numerical analysis results are of certain reference value for the design of steel lazy-wave riser in deep water.

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曹喜平,顾继俊,黄俊,陈磊磊,贾纪川.钢质缓波型立管安装转移过程中的非线性力学响应[J].中国海洋平台,2023,(02):77-83

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  • 在线发布日期: 2023-04-23
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