| 深海钢悬链立管触地点动力响应分析 |
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| 引用本文： | 傅俊杰,杨和振.深海钢悬链立管触地点动力响应分析[J].海洋工程,2009,27(2):36-40. |
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| 作者姓名： | 傅俊杰 杨和振 |
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| 作者单位： | 上海交通大学海洋工程国家重点实验室,上海,200240 |
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| 基金项目： | 国家自然科学基金重点项目，高等学校博士学科点基金 |
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| 摘 要： | 研究深海钢悬链立管(SCR)在海洋环境载荷作用下的动力响应.利用非线性弹簧模拟立管与海床触地点的耦合模型,通过模态分析得到钢悬链立管的动力特性参数;时域动力响应分析获得不同工况下触地点及典型部位的位移、弯矩和应力时程.比较分析表明:浮体垂荡运动对触地点的应力状态影响较大,触地点附近存在钢悬链立管动力响应过程中的位移极值点和弯矩极值点.所提方法为触地点区域模拟分析提供了新思路,给出的分析结论对钢悬链立管设计有一定借鉴意义.
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| 关 键 词： | 钢悬链立管 触地点 动力响应 非线性弹簧 |
| 收稿时间： | 2008/7/21 0:00:00 |
| 修稿时间： | 2008/12/17 0:00:00 |
Dynamic response analysis of a deepwater steel catenary riser at the touchdown point |
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| WANG Cui,ZHANG Xue-qing and SUN Ying-lan.Dynamic response analysis of a deepwater steel catenary riser at the touchdown point[J].Ocean Engineering,2009,27(2):36-40. |
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| Authors: | WANG Cui ZHANG Xue-qing and SUN Ying-lan |
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| Institution: | State Key Laboratory of Ocean Engineering;Shanghai Jiaotong University;Shanghai 200240;China |
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| Abstract: | Based on theory of three-dimensional hydrodynamics, an Euler-Lagrangian particle model is established to study the transport and water exchange capability in the Jiaozhou Bay. The three-dimensional hydrodynamic model, driven by tide and wind, is used to study the effects of wetting and drying of estuarine intertidal flats by the dry-wet grid technology based on the Estuarine, Coastal and Ocean Model (ECOM). The particle model includes the advection and the diffusion processes, of which the advection process is simulated with a certain method, and the diffusion process is simulated with the random walk method. The effect of the intertidal zone, the turbulent diffusion and the timescales of the water exchange are also discussed. The results show that a moving boundary modelcan simulate the transport process of the particle in the intertidal zone, where the particles are transported for a longer distance than that of the stationary result. Simulations with and without the turbulent random walk show that the effect of turbulent diffusion is very effective at spreading particles throughout the estuary and speeding up the particle movement. The spatial distribution of residence time is given to quantify the water exchange capability that has very important ramifications to water quality. The effect of wind on the water exchange is also examined and the southeasterly wind in summer tends to block the water exchange near the northeast coast, while the northerly wind in winter speeds up the transport process. These results indicate that the Lagrangian particle model is applicable and has a large potential to help understanding the water exchange capability in estuaries, which can also be useful to simulate the transport process of contaminant. |
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| Keywords: | steel catenary riser touchdown point dynamic response nonlinear spring |
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