| 摘要: |
| 阐述我国首批大型液化天然气（Liquefied Natural Gas，LNG）船（1.47×105 m3）艉部局部振动问题产生的原因及解决方案。通过在船体机舱线型区域加装涡流发生器等附加装置，改善流经螺旋桨的流场并降低螺旋桨激振力，从而大幅度改善艉部的局部振动。对于新造船的振动问题，选择正确的研究方案是成功解决问题的第一步，但受时间、成本等客观条件的限制，在研究技术方案时可供选择的手段往往不多，采用水下摄像观测、传感器信息采集和计算流体力学（Computational Fluid Dynamics，CFD）模拟分析等技术手段可大幅提高方案制订的效率和准确性。通过剖析LNG船安装、优化涡流发生器解决振动问题的案例，为相关问题及其解决方案的研究提供可借鉴的方法和经验。 |
| 关键词: 大型液化天然气船 振动 计算流体力学分析 涡流发生器 |
| DOI：DOI：10.14056/j.cnki.naoe.2017.03.009 |
| 分类号:U661.44；U674.133.3 |
| 基金项目: |
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| Study on the Vibration and Solutions of China¢s First Series of LNG Carriers |
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ZHU Zhe-ren
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China LNG Shipping (Holdings) Ltd.
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| Abstract: |
| This paper elaborates the reason behind the local vibration of stern and its solutions for China’s first series of large Liquefied Natural Gas (LNG) carriers (1.47×105 m3). Hull appendages (such as the vortex generator) around the engine region are installed to improve the flow passing the propeller and to reduce the propeller exciting forces. Thus, the local vibration at stern is significantly reduced. To solve the vibration problem of new buildings, selection of a correct research plan is the first step, but there are not many options available due to the limitations of time, cost and other conditions. However, the efficiency and correctness of the plan can be effectively improved with underwater imagery, sensor information collection and the simulations based on Computational Fluid Dynamics (CFD). The analysis on the vibration solution for installing and optimizing the vortex generators on LNG carriers would provide references and experience for the solutions of the similar problem. |
| Key words: large LNG carrier vibration CFD analysis vortex generator |
