在波浪作用下悬挂点Z向运动及刚体摆动对SCR位移影响分析

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摘要针对钢悬链式立管刚体摆动对横流向响应影响开展研究。在大挠度细长梁模型、波浪荷载、顶部运动及刚体摆动模型基础上，采用有限元方法求解结构响应。采用李萨如图形实现结构计算校核。计算表明运动响应从顶部悬挂点的YZ平面较窄幅度的振荡逐渐向底部触地点的ZX平面较宽幅度的八字形振荡发展。总体而言，随着水深增加，响应减小。顶部区域位移响应降低幅度较为剧烈。底部区域位移降低幅度较弱。刚体摆动响应表现为幅值的增大、减小甚至抵消，与矢径s线性相关。总之，刚体摆动对结构位移响应影响可通过一定的安全系数进行计算处理。希望上述研究对钢悬链式立管横流向计算提供一些合理建议。

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关键词 ：钢悬链式立管, 刚体摆动, 波浪作用, 横流向响应, Cable3D

Abstract：Here, effects of rigid body swing of steel catenary riser (SCR) on its transverse flow response was studied. The SCR response was solved with the finite element method considering large-deflection slender beam model, wave loading, top transverse motion input and rigid body swing model. Lissajous figures were used to realize verification of structural calculation. The calculation showed that the SCR response develops gradually from narrower range oscillation in YZ plane of the suspension point to a wider range ‘8’ shape oscillation in ZX plane of bottom touch point, the deeper the water depth, the smaller the response; the top region displacement response drops more sharply, while bottom region displacement response drops more slightly; rigid body swing effects reveals increase or decrease in amplitude, or even counterbalance, it is linearly related to radius vectors; effects of rigid body swing on SCR structural transverse displacement response can be estimated with a certain safe coefficient; the study results provides a reference for transverse flow response calculation of SCR.

Key words： steel catenary riser (SCR) rigid body swing wave action transverse flow response Cable3D

收稿日期: 2018-10-10 出版日期: 2020-06-28

引用本文:

朱擘1，黄维平1，姚兴隆1，刘娟2. 在波浪作用下悬挂点Z向运动及刚体摆动对SCR位移影响分析[J]. 振动与冲击, 2020, 39(13): 215-223.
ZHU Bo1, HUANG Weiping1, YAO Xinglong1, LIU Juan2. Effects of top suspension point transverse motion under wave action and rigid body swing on SCR displacement. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(13): 215-223.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I13/215

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