| 引用本文: | 周珂,胡志强,赵东亚.不同浪向下LNGC旁靠FLNG作业时水动力干扰分析[J].哈尔滨工业大学学报,2018,50(8):114.DOI:10.11918/j.issn.0367-6234.201707024 |
| ZHOU Ke,HU Zhiqiang,ZHAO Dongya.Hydrodynamic interactions between side-by-side offloading FLNG and LNGC under different wave directions[J].Journal of Harbin Institute of Technology,2018,50(8):114.DOI:10.11918/j.issn.0367-6234.201707024 |
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| 不同浪向下LNGC旁靠FLNG作业时水动力干扰分析 |
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周珂1,2,胡志强3,赵东亚1,2
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(1.海洋工程国家重点实验室(上海交通大学),上海 200240;2.高新船舶与深海开发装备协同创新中心,上海 200240; 3.School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK)
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| 摘要: |
| 液化天然气运输船(LNGC)旁靠浮式液化天然气生产系统(FLNG)卸载作业时，两船体之间会产生明显的相互水动力干扰。由于单点系泊的风标效应，目前大多数研究针对迎浪条件下水动力分析.在实际环境中，斜浪对两船运动的影响不可忽视.为此，利用理论分析和模型试验相结合，基于三维势流理论和在两船间自由液面添加人工阻尼的方法，对迎浪和斜浪条件下间隙水体的共振现象和两船的一阶水动力性能进行研究.并采用中场法计算两船的二阶水动力参数，揭示浪向对FLNG和LNGC平均漂移力的影响.结果表明：浪向的变化在一定角度范围内不影响自由面阻尼的取值，但是对间隙水体的共振模态和幅值有影响.浪向的改变影响两船间的遮蔽效应，使得FLNG对LNGC在斜浪下的运动响应产生显著的抑制作用.同时，不同浪向下两船平均漂移力的主要成分也发生变化.
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| 关键词: FLNG 旁靠 遮蔽效应 阻尼盖法 模型试验 |
| DOI：10.11918/j.issn.0367-6234.201707024 |
| 分类号:U661.1 |
| 文献标识码:A |
| 基金项目:国家科技重大专项子课题(2016ZX05028-002-004) |
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| Hydrodynamic interactions between side-by-side offloading FLNG and LNGC under different wave directions |
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ZHOU Ke1,2,HU Zhiqiang3,ZHAO Dongya1,2
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(1.State Key Laboratory of Ocean Engineering (Shanghai Jiao Tong University), Shanghai 200240,China; 2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240,China; 3.School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK)
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| Abstract: |
| When the side-by-side offloading operation is carried out between FLNG and LNGC, strong hydrodynamic interactions will be induced by the two hulls. The weather vane effect of single point mooring system has attracted most focuses on the analysis of side-by-side configuration in head waves. Nevertheless, the influence of oblique waves on the motion responses of the side-by-side system cannot be ignored. This article investigates the hydrodynamic responses of the side-by-side system through theoretical analysis method and model testing method. Based on the 3-D potential theory and artificial damping-lid method applied on the gap surface between two vessels, the gap water resonance and linear hydrodynamic performances of side-by-side FLNG and LNGC are studied under oblique and head waves. Middle-field method is adopted to calculate the second-order hydrodynamic parameters, and reveal the influence of wave directions on the mean drift forces of both vessels. Investigation shows that the change of wave directions within a certain range does not influence the value selection of the free surface damping, while imposes influence on the mode and amplitude of gap water resonance. The variation of wave directions affects the shielding effect between FLNG and LNGC, and the motion responses of LNGC are greatly suppressed by FLNG under oblique waves. Besides, the main components of mean drift forces on the two vessels change accordingly under different wave directions.
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| Key words: FLNG side-by-side shielding effect damping-lid method model testSymbol`@@ |
