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考虑大变形的深水立管涡激振动非线性分析方法
吴学敏^1,2,滕文刚³,王辉³
(1.中国海洋大学山东省海洋工程重点实验室,山东青岛 266100;2.青岛农业大学建筑工程学院,山东青岛 266109;3.中石油华东设计有限公司,山东青岛 266000)

摘要:

在以往研究成果的基础上,提出考虑大变形的深水立管涡激与参激耦合振动的力学模型,并开发相应的计算程序。在验证新模型计算程序可靠性的基础上,以服役于1500 m水深的深水顶张式立管为算例,对其涡激振动的动力特性、涡激振动的响应特征以及涡激参数和环境荷载参数对立管振动响应的影响进行研究。结果表明:提出的分析方法能够很好地预测深水立管涡激振动的特征,深水立管的涡激振动响应受顶端平台激扰的影响,其响应特征是环境荷载、立管结构参数、顶部平台垂荡运动的函数。

关键词: 深水立管大变形参数激扰涡激振动几何非线性动力分析

DOI：10.3969/j.issn.1673-5005.2019.06.007

分类号::TE 53

文献标识码:A

基金项目:国家自然科学基金项目(51179179,6)

A non-linear analysis method for vortex-induced vibration of deepwater risers with large deflection

WU Xuemin^1,2, TENG Wengang³, WANG Hui³

(1.Shandong Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China;2.Architectural and Civil Engineering Institute, Qingdao Agricultural University, Qingdao 266109, China;3.CNPC East China Design Institute Company Limited, Qingdao 266000, China)

Abstract:

A new non-linear analysis method was proposed in this work to predict the vortex-induced vibration(VIV) response of deepwater riser, in which large deformation of risers was considered, and accordingly a program for the solution of the model was designed. In this paper, the VIV response of deepwater top tensioned riser operated in a water depth of 1500 m was investigated as a case study. The new method can be used to predict the VIV characters of deepwater risers, and the results indicate that the effect of the heave of a floating platform in VIV response of deepwater risers is strongly dependent on the environmental load, riser parameters, the amplitude and frequency of the heave.

Key words: deepwater risers large deflection parameter excited vibration vortex-induced vibration geometric nonlinearity dynamic analysis