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液舱晃荡对船舶横摇运动影响的数值研究 被引量:10

Numerical Research on Effect of Sloshing on Ship Roll Motion
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摘要 为了研究加载液舱在船舶航行时舱内液体晃荡对船体横摇运动的影响,对船体外流场(波浪场)与液舱内流场(液体非线性晃荡)分别采用势流理论方法计算,建立了在波浪中船体与液舱流体晃荡耦合的时域运动方程。其中波浪中船体水动力和时延函数采用三维频域法和脉冲响应函数法计算获得,舱内液体非线性晃荡采用时域边界元法计算。对横浪中加载了方形液舱的15000GT集装箱船在不同液舱装载深度工况下,就液舱流体晃荡及其与船体运动耦合分别进行了计算模拟与验证。研究表明,耦合运动模拟结果能清晰地反映液舱晃荡对船体横摇运动的影响,数值结果与试验吻合良好,并具有较高的计算效率。 To analyze the effect of sloshing on ship roll motion, both flow fields inside the tank and outside the ship are dealt with using potential flow theory, and a global ship motion coupled with tank sloshing is established. 3D BEM in frequency domain and impulse response function method are applied to get wave forces acting on ship hull and retardation function, while boundary element method is used to solve tank sloshing problem. A 15000GT container ship with different depths of the water in the tank under the working condition of beam sea is investigated with numerical simulation. It is shown that numerical simulation of coupling ship roll motion clearly reflects the influence of tank sloshing on the ship motion. Numerical simulation has quite high efficiency and is in good agreement with experiment. That provides a rapid approach to analyze the motion of a ship with fluid tanks or tank stabilizers in the pre-design stage.
出处 《中国造船》 EI CSCD 北大核心 2015年第1期1-10,共10页 Shipbuilding of China
关键词 时域 势流理论 液舱晃荡 横摇运动 运动耦合 脉冲响应函数 potential flow theory in time domain tank sloshing roll motion coupling motion impulse-response function
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共引文献29

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