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ADVANCES IN THE HYDRODYNAMICS OF SIDE-BY-SIDE MOORED VESSELS

机译:并排式船舶的水动力学研究进展

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摘要

In this paper a comparison between model basin experiments and results of diffraction computations on side-by-side moored LNG carriers is presented. The computations are based on a new lid method in diffraction codes to suppress non-realistic high wave elevations between the two floating objects. This lid method was originally formulated by Chen (2005). In this method a damping value is added to the free surface by means of a damping parameter. Since no theoretical solution can be found to establish the required value of the damping parameter, model basin experiments have been performed to determine this value. However from the results of the model basin experiments it is shown that it is difficult to obtain one unique value of the lid damping (for the 4m or small gap). The way of tuning the damping value of the lid is crucial. Tuning the damping based on first order results, like motions or wave height RAO's will lead to a much larger variation in the estimate of the second order sway wave drift force transfer function.
机译:在本文中,进行了模型盆地实验与并排停泊的LNG船的衍射计算结果的比较。该计算基于衍射代码中的新盖方法,以抑制两个浮动对象之间不切实际的高波高程。这种盖方法最初是由Chen(2005)提出的。在该方法中,通过阻尼参数将阻尼值添加到自由表面。由于无法找到建立阻尼参数所需值的理论解,因此已经进行了模型盆地实验来确定该值。但是,从模型盆地实验的结果可以看出,很难获得一个唯一的盖阻尼值(对于4m或更小的间隙)。调节盖子阻尼值的方法至关重要。根据一阶结果来调整阻尼,例如运动或波高RAO,将导致二阶摇摆波漂移力传递函数的估计值产生更大的变化。

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