Time Prediction Enhancement for the Bottom Slamming Phenomenon

机译：底部砰击现象的时间预测增强

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The present work describes a prediction method for the bottom slammingpressure on the keel level. The new procedure consists in usingthe ship's Centre of Gravity Response Amplitude Operator results(CGRAO). This method analyzes the translational and rotational motionon a regular wave in order to find if there is an emergence of theship forefoot. This method is based on a fine time steps and on a precisegeometric calculation which yields to an exact calculation of thepressure at the impact of a point at the keel with the wave. Also theadvantage of this method is to show a precise time evolution of thebottom impact with the wave and in consequence to enhance the physicalunderstanding of the slamming phenomenon. The slamming pressurecalculation, in the present work, is based on the empirical correlation(Chuang 1967) and Wagner theory according to Faltinsen (1990).The ship model chosen for this application is the famous S175 containership in the ballast load condition and Froude number varies from0.1 to 0.278 in the head sea.

机译：本工作描述了龙骨水平底部砰击压力的预测方法。新程序包括使用船舶的重心响应幅度算子结果（CGRAO）。该方法分析规则波上的平移和旋转运动，以便确定前脚掌是否出现。这种方法是基于精细的时间步长和精确的几何计算得出的，该计算可以精确计算龙骨上的一点在波浪作用下的冲击压力。该方法的优点还在于显示底部冲击与波浪的精确时间演变，并因此增强对撞击现象的物理理解。目前的砰击压力计算是基于经验相关性（Chuang 1967）和根据Faltinsen（1990）的Wagner理论进行的。为此应用选择的船舶模型是著名的S175集装箱船，在压载载荷条件下，弗洛德数变化在公海中从0.1到0.278

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《International offshore and polar engineering conference;ISOPE-2009》|2009年|p.543-550|共8页
会议地点 Osaka(JP);Osaka(JP)
作者
Amine Rahati; Benameur Hamoudi;
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作者单位

Département de Génie Maritime. Faculté de Génie Mécanique. U.S.T.M.B. Oran Algeria;

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关键词
bottom slamming; impact pressure; air cushion;

机译：底部撞击冲击压力气垫;

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7. Figure 1: Example of visualization of long range contacts for: (A) regions, here enhancer-promoter contacts, for two 10 kb resolution Hi-C maps from human Fetal Brain cells. Contacts were calculated up to 30 bins distance each way from the point of interest. Top to bottom: a Jbrowse (Skinner et al., 2009) screenshot with genes and interaction profile representation (points of interest in green, their contact predictions in yellow); HiCEnterprise interaction profile plot with intensities (weighted by distance) and −log10 of FDR corrected p-values (q-values) with a threshold set at 0.01. (B) TADs, here HiCEnterprise visualization for 150 kb resolution Hi-C map of 17th chromosome from HUVEC. Left upper trianle: original Hi-C map contact frequencies; right lower triangle: −log10 of q-values of the interdomain interactions calculated with hypergeometric distribution. [O] . -1

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Time Prediction Enhancement for the Bottom Slamming Phenomenon

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