计及平台垂荡的立管涡激振动模拟与试验验证

doi:10.16183/j.cnki.jsjtu.2019.04.013

上海交通大学学报（自然版） ›› 2019, Vol. 53 ›› Issue (4): 480-487.doi: 10.16183/j.cnki.jsjtu.2019.04.013

计及平台垂荡的立管涡激振动模拟与试验验证

袁昱超，薛鸿祥，唐文勇

上海交通大学海洋工程国家重点实验室；高新船舶与深海开发装备协同创新中心，上海 200240

出版日期:2019-04-28 发布日期:2019-04-28
通讯作者: 薛鸿祥，男，副教授，博士生导师，电话(Tel.)：021-34204470；E-mail：hongxiangxue@sjtu.edu.cn.
作者简介:袁昱超(1991-)，男，北京市密云县人，博士生，主要从事深海立管涡激振动研究.
基金资助:
国家自然科学基金（51579146；51490674），上海市青年科技启明星计划（16QA1402300）资助项目

Numerical Simulation and Experimental Verification of Vortex-Induced Vibration for Risers After Considering Platform Heave Motion

YUAN Yuchao,XUE Hongxiang,TANG Wenyong

State Key Laboratory of Ocean Engineering； Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China

Online:2019-04-28 Published:2019-04-28

摘要/Abstract

摘要： 针对顶端平台垂荡运动与涡激振动联合作用下顶张式立管动力响应预报问题，提出了一套可供选择的时域数值模拟方法.涡激振动模拟基于流体力分解模型，流体力系数库来源于受迫振荡试验数据.采用时变轴向张力等效立管顶端平台垂荡运动对结构动力响应的影响效应，在每一分析步内根据实时轴向张力更新结构刚度矩阵.最新公布的某2.552m立管模型试验结果用于验证推荐数值方法在顶张力恒定及时变条件下的有效性，预报结果与试验观测吻合度较高.针对数值模拟与模型试验对比研究中发现的亚谐振响应、非对称振型及Mathieu型共振等现象，进行了深入研究并给出相应解释.

关键词: 平台垂荡, 时变轴向张力, 顶张式立管, 涡激振动, 数值模拟

Abstract: An alternative time domain numerical simulation approach is proposed to predict top-tensioned risers’ dynamic response under combined action of top-end platform heave motion and vortex-induced vibration (VIV). The VIV simulation is based on force-decomposed model, and hydrodynamic force coefficient database originates from forced vibration experimental data. The time-varying axial tension is adopted, and the platform heave motion effect on structural response is taken into account, and structural stiffness matrix is updated at each time step according to the variation of axial tension. A newly published 2.552m riser model test is utilized to validate the proposed numerical approach under constant and time-varying top-end tension situations, and the predicted results based on the numerical model show a good agreement with test observations. For the sub-harmonics response, asymmetrical vibration shape and Mathieu-type resonance phenomena captured in the comparisons between numerical and experimental results, further researches are carried out and the corresponding essential explanations are given as well.

Key words: platform heave motion, time-varying axial tension, top-tensioned risers, vortex-induced vibration, numerical simulation

中图分类号:

P 756

袁昱超，薛鸿祥，唐文勇. 计及平台垂荡的立管涡激振动模拟与试验验证[J]. 上海交通大学学报（自然版）, 2019, 53(4): 480-487.

YUAN Yuchao,XUE Hongxiang,TANG Wenyong. Numerical Simulation and Experimental Verification of Vortex-Induced Vibration for Risers After Considering Platform Heave Motion[J]. Journal of Shanghai Jiaotong University, 2019, 53(4): 480-487.

参考文献

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计及平台垂荡的立管涡激振动模拟与试验验证

Numerical Simulation and Experimental Verification of Vortex-Induced Vibration for Risers After Considering Platform Heave Motion

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