| 刘春雷,尹勇,孙霄峰,张秀凤,神和龙.散货船自由浮态计算简化方法[J].,2017,57(1):55-60 |
| 散货船自由浮态计算简化方法 |
| Simplified method of bulk carrier′s free floatation calculation |
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| DOI：10.7511/dllgxb201701008 |
| 中文关键词: 船舶工程 自由浮态 散货船 配载仪 吃水差 |
| 英文关键词: ship engineering free floatation bulk carrier loading computer trim |
| 基金项目:“八六三”国家高技术研究发展计划资助项目(2015AA016404)；海洋公益性行业科研专项(201505017-4)；中央高校基本科研业务费专项资金资助项目(3132016310). |
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| 摘要点击次数: 1228 |
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| 中文摘要: |
| 根据散货船特点探讨了一种面向工程应用的船舶自由浮态计算简化方法．在矩阵法的基础上，将7个水线面要素简化到4个，简化雅克比矩阵求解．采用全选主元高斯消去法求解线性方程组，以船舶浮态平衡方程组作为迭代终止条件，保证计算精度．以散货船“DOLCE VITA”及“RUI AN CHENG”为例进行了实例计算，对20个压载舱进行了20万次随机装载实验，验证了算法在有横倾下的收敛性和稳定性；对5个货舱进行了20万次随机装载实验，验证了算法在有纵倾下的收敛性和稳定性；对典型载况进行计算，和装载手册给定值相比，吃水差误差都在0.01 m以下．结果表明 该算法只需计算任意倾斜水线面下的排水体积和浮心坐标，计算量较小，程序实现简单，实时性、鲁棒性较好，具有一定的工程实用价值． |
| 英文摘要: |
| According to the characteristics of bulk carrier, a simplified method of ship free floatation calculation for engineering application is studied. Based on matrix method, 7 waterline plane elements are reduced to 4, and the solution of Jacobi matrix is simplified. Complete Gaussian pivoting elimination method is adopted to solve the linear equations. In order to ensure the accuracy of the calculation, the floating state balance equations are used as the iteration stop conditions. Bulk carrier “DOLCE VITA” and “RUI AN CHENG” are taken as examples, 200 000 random loading experiments are carried out on 20 ballast tanks to verify the convergence and robustness of the algorithm in heeling condition. 200 000 random loading experiments are carried out on 5 cargo holds to verify the convergence and robustness of the algorithm in trim condition. Typical load conditions are calculated, and compared with the given value in the loading manual the trim error is less than 0.01 m. The calculation results show that in this algorithm the calculating amount is decreased because only displacement volume under any tilt waterline plane and center of buoyancy need to be computed, the calculation amount is small, the program is very simple, real-time, robust and has a certain engineering application value. |
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