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  

Effects of top suspension point transverse motion under wave action and rigid body swing on SCR displacement

作　　者：朱擘 黄维平[1] 姚兴隆 刘娟[2] ZHU Bo;HUANG Weiping;YAO Xinglong;LIU Juan(Shangdong Provincial Key Lab of Ocean Engineering,Ocean University of China,Qingdao 266071,China;Institute of Civil Engineering,Agriculture University of Qingdao,Qingdao 266009,China)

机构地区：[1]中国海洋大学山东省海洋工程实验室,山东青岛266071 [2]青岛农业大学建筑工程学院,山东青岛266009

出　　处：《振动与冲击》2020年第13期215-223,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51239008)。

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。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.

关 键 词：钢悬链式立管 刚体摆动 波浪作用 横流向响应 Cable3D 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]