Abst'/> Tearing down the wall - The inclining experiment
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Tearing down the wall - The inclining experiment

机译:撕毁墙壁-倾斜的实验

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AbstractIt is a well-known fact that the current method for calculating a ship's vertical centre of gravity(VCG)following inclining experiments is limited when considering magnitude of applied heel angle and accuracy achieved for certain hull-forms due to the assumption of unchanged metacentre position when the vessel is heeled. New methods for calculating theVCGhave been proposed, notably theGeneralisedand theGraphicalmethods. This paper aims to test these methods on a range of vessels, as well as present and contrast a new method named, thePolarmethod. The test will establish the error potential for each method using a purely technical software-simulated inclining experiment. Using the established error potential, a correctedVCGis calculated from actual incliningVCGvalues, which have been evaluated against the loading conditions for each vessel to see if the stability margins have been compromised. The study confirms theClassicalmethod's dependency on applied heel angle magnitude, the change in waterplane area and that it compromises safety in some cases. The other methods, especially theGeneralisedand thePolar, produce very accurate results for any floating position of the vessel, highlighting the need totear down the wall-sided assumption implicit in theClassicalmethod and replace it with the better and more flexible methods.HighlightsInclining experiment calculation methods tested on a range of vessels.A technical software-simulated inclining experiment has been applied.Using established error potentials, actual VCG values validity has been assessed.New,Polar method, for calculating VCG following inclining experiment presented.Newly proposed methods show better accuracy and flexibility than the Classical method.
机译: 摘要 众所周知,当前用于计算船舶垂直重心的方法 V C G 在考虑施加的后跟角度的大小和某些情况下获得的精度时,以下倾斜实验是有限的船体形状是由于假定当船后跟后偏心位置不变。用于计算 V C G 通用图形方法。本文旨在在一系列容器上测试这些方法,并提出并对比一种名为 Polar 方法的新方法。该测试将使用纯技术软件模拟的倾斜实验确定每种方法的潜在错误。使用已建立的潜在错误,更正后的 V C G 是根据实际倾斜度计算得出的 V C G < / mml:math>值,已针对每个船只的装载条件进行了评估,以查看稳定性裕度是否受到损害。研究证实了 Classical 方法对所施加的后跟角度大小的依赖,水上飞机面积的变化,并且在某些情况下会损害安全性。其他方法,尤其是通用 Polar ,对于船只的任何浮动位置都可以产生非常准确的结果,从而强调了需要< ce:italic>推翻墙壁中的经典方法中隐含的侧面假设,并用更好,更灵活的方法代替。 突出显示 在一系列容器上测试的递增实验计算方法。 已应用技术模拟的倾斜实验。 使用已建立的潜在错误,已评估了实际VCG值的有效性。 < ce:list-item id =“ u0025”> 新建,极性方法,用于在提出倾斜实验后计算VCG。 新提出的方法比经典方法显示出更好的准确性和灵活性。

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