深水钢悬链线立管多场源随机激励耦合作用机制
Research on Coupling Mechanism of Multi-field Source Random Excitation of Deep-water Steel Catenary Riser
王琰 1朱海涛 2何世伟1
作者信息
- 1. 天津大学 建筑工程学院,天津 300072
- 2. 天津大学 建筑工程学院,天津 300072;天津大学 滨海土木工程结构与安全教育部重点实验室,天津 300072
- 折叠
摘要
海洋立管运动状态的精确分析是海洋资源开发及工程领域的一个重要研究方向.已有研究主要关注海洋立管在浮体激励下的动态表现,而忽略了波浪荷载对其运动状态的影响.鉴于此,首先建立适用于计算分析自由悬挂钢悬链线立管的二维动力学数学模型;基于JONSWAP波浪谱和Longuet-Higgins模型得到随机波浪力,将立管顶部浮体激励简化为简谐激励,分析顶部浮体简谐激励和随机波浪力耦合作用下的海洋立管的动力响应.结果表明,绝大多数情况下浮体激励对于立管的动力响应的影响占优;大波高低周期的波浪力会显著增加立管的位移峰值.
Abstract
Precise analysis of the motion state of marine risers is a significant research direction in marine resource development and ocean engineering.Previous studies primarily concerned about the dynamic performance of marine risers under floating body excitation,ignoring the effect of wave loading.In view of this,a two-dimensional dynamic mathematical model was firstly estab-lished for the use of the calculation and analysis of steel catenary riser.Random wave force was numerically obtained based on JONSWAP wave spectrum and Longuet-Higgins model,while the top floating body excitation was simplified to harmonic excitation.The dynamic analysis was car-ried out on the riser applying harmonic excitation and random wave force at the same time.The results show that the effect of floating body excitation on the dynamic response of the riser is dominant than random wave force in the vast majority of cases;meanwhile,the dynamic response of the riser can be significantly increased by the wave force with high and low periods.
关键词
钢悬链线立管/随机波浪力/顶部浮体激励Key words
steel catenary riser/random wave force/floating body excitation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据