Experimental and numerical analyses of sloshing flows
Experimental and numerical analyses of sloshing flows
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DOI：
10.1007/s10665-006-9124-4
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发表时间：
2007-05
影响因子：
1.3
通讯作者：
Yonghwan Kim
中科院分区：
文献类型：
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作者：
Yonghwan Kim
近年来，由于大型LNG运输船和LNG平台的建造，对晃动分析的需求正在上升。本文研究了船舶货物中强非线性晃动流动的实验和数值观测及其与船舶运动的耦合效应。在实验中观察到了剧烈晃动流动，并采用了两种不同的数值方法：有限差分法和光滑质点流体力学(SPH)方法对剧烈晃动流动进行了数值模拟。介绍了晃荡流动分析中的几个物理问题，并描述了相应的数值模型。这项研究表明，基于物理的数值格式在预测剧烈晃动流动和晃动引起的冲击压力方面是必不可少的。为了研究晃荡对船舶运动的影响，将基于脉冲响应函数(IRF)的船舶运动程序与所建立的晃动分析数值模型相耦合。结果表明，晃荡诱导力和力矩的非线性对耦合效应起着至关重要的作用。
Recently the demand for sloshing analyses is rising because of the construction of large LNG carriers and LNG platforms. This study considers the experimental and numerical observations of strongly nonlinear sloshing flows in ship cargo and their coupling effects with ship motion. Violent sloshing flows in experiments are observed, and two different numerical methods, the finite-difference method and smoothed-particle-hydrodynamics (SPH) method, are applied for the simulation of violent sloshing flows. Several physical issues are introduced in the analysis of sloshing flows, and the corresponding numerical models are described. This study demonstrates that physics-based numerical schemes are essential in the prediction of violent sloshing flows and sloshing-induced impact pressure. To study the sloshing effects on ship-motion, a ship-motion program based on an impulsive response function (IRF) is coupled with the developed numerical models for sloshing analysis. The results show that the nonlinearity of sloshing-induced forces and moments plays a critical role in the coupling effects.