中国首批大型LNG船振动问题及解决方案研究  

Study on the Vibration and Solutions of China's First Series of LNG Carriers

作　　者：朱哲仁 袁红良 ZHU Zhe-ren;YUAN Hong-liang(China LNG Shipping (Holdings) Ltd, Hong Kong SAR. 999077, China;Hudong-zhonghua Shipbuilding (Group) Co., Ltd., Shanghai 200129, China)

机构地区：[1]中国液化天然气运输(控股)有限公司,香港特别行政区999077 [2]沪东中华造船(集团)有限公司,上海200129

出　　处：《船舶与海洋工程》2017年第3期40-45,共6页Naval Architecture and Ocean Engineering

摘　　要：阐述我国首批大型液化天然气(Liquefied Natural Gas,LNG)船(1.47×10~5 m^3)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。This paper elaborates the reason behind the local vibration of stern and its solutions for China’s first series oflarge Liquefied Natural Gas(LNG)carriers(1.47×105m3).Hull appendages(such as the vortex generator)around theengine region are installed to improve the flow passing the propeller and to reduce the propeller exciting forces.Thus,thelocal vibration at stern is significantly reduced.To solve the vibration problem of new buildings,selection of a correctresearch plan is the first step,but there are not many options available due to the limitations of time,cost and otherconditions.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 thevibration solution for installing and optimizing the vortex generators on LNG carriers would provide references andexperience for the solutions of the similar problem.

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 

分 类 号：U661.44[交通运输工程—船舶及航道工程] U674.133.3[交通运输工程—船舶与海洋工程]