散货船配载仪中破舱稳性计算

摘要

为提高散货船配载仪中破舱稳性的计算精度,基于船舶三维设计数据进行破舱稳性计算.首先沿船长方向对船体的三维设计模型进行切片,得到船体的横剖面型值数据;然后通过等距偏移模拟船体外板厚度,得到船舶外板数据;最后分别利用最小功法和静平衡法计算破损船舶各个横倾角度的复原力臂.以38300 t散货船"RUI AN CHENG"为例,对3个典型载况进行了破舱稳性计算.计算结果表明:与 NAPA 计算值相比,静平衡法的计算结果具有较高精度,满足主流船级社的精度要求,而最小功法的计算结果则有较大误差.同时,静平衡法不仅适用于散货船配载仪的破舱稳性计算,对液货船、集装箱船等的配载仪的开发也具有一定参考价值.%To improve accuracy of ship damage stability calculation in bulk carrier's loading computer,ship damage stability is calculated on the basis of ship 3D design data.First,offset data of each cross-section is obtained by slicing designed 3D model longitudinally;Then,the hull data is obtained by equidistant offsetting;Finally,the righting arms under different heel angles are calculated utilizing the static equilibrium method and the minimum work method respectively.As an example, the ship damage stability of 38 300 tons bulk carrier"RUI AN CHENG"in three typical loading conditions is calculated.The calculation results indicate that using NAPA as reference the static equilibrium method is more accurate and meets the accuracy requirements of the leading classification societies,while the minimum work method is proved to be inexact.Meanwhile,the static equilibrium method is applicable not only to bulk-cargo ship's damage stability calculation,but also to other ship types such as liquid cargo ship and container ship during the design of loading computer.