Dynamic characteristics of lazy wave risers under internal solitary waves

被引：0
|
作者：
Yu Y. [1 ,2 ]
Liu X.-W. [1 ,2 ]
Li Z.-M. [1 ,2 ]
Sun R.-F. [1 ,2 ]
Yang Z.-L. [1 ,2 ]
Xu L.-X. [1 ,2 ]
机构：
[1] Tianjin Key Laboratory of Port and Ocean Engineering, Tianjin University, Tianjin
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2024年 / 28卷 / 06期
关键词：
dynamic response; internal solitary wave; KdV theory; steel lazy wave riser; vector form intrinsic finite element method;
D O I：
10.3969/j.issn.1007-7294.2024.06.001
中图分类号：
学科分类号：
摘要：
The large number of internal solitary waves in the South China Sea seriously threaten the safety of offshore engineering operations. In this paper, the vector form intrinsic finite element (VFIFE) method was used to analyze the dynamic characteristics of deep-sea steel lazy wave risers (SLWR) under the action of in⁃ ternal solitary waves. The dynamic model of a deep-sea steel lazy wave riser considering soil reaction in touchdown zone and internal solitary wave load was established. The internal solitary wave load was solved according to the mKdV equation. Fortran calculation program was compiled based on vector form intrinsic fi⁃ nite element beam element. The displacement extremum and variation trends of tension and bending moment of a riser under different incident angles were analyzed. The dynamic characteristics of a steel lazy wave riser and a simple steel catenary riser under internal solitary waves were compared. The results show that under the action of internal solitary waves, the steel lazy wave riser will have a greater displacement response, espe⁃ cially the upper section will have a greater horizontal displacement. Compared with the simple steel catenary riser, the steel lazy wave riser has a more significant tension variation amplitude and a more complex bending moment variation trend. © 2024 China Ship Scientific Research Center. All rights reserved.
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页码：803 / 817
页数：14
相关论文
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