20.8万吨散货船总纵弯矩优化分析

Optimization of longitudinal bending moment for 208000 DWT bulk carrier

本文总结散货船的各类典型装载工况,并针对散货船是否有首尾尖舱,分别梳理了影响总纵弯矩的决定性工况。以中国船舶及海洋工程设计研究院(MARIC)开发设计的20.8万吨散货船作为母型船,以优化总纵弯矩为目标,分析优化散货船总纵弯矩的多种途径,包括取消首尾尖舱、将底墩和顶墩改为压载舱、调整槽型舱壁的位置和方向、调整燃油舱在机舱和货舱区的舱容分布等。本文在分析如何优化总纵弯矩的同时,强调要综合考虑总布置、装载、浮态和规范要求。同时针对空船重量重心对总纵弯矩的敏感度影响进行定量分析,可为在船舶设计初期控制总纵弯矩提供一定参考价值。

This paper summaries typical loading conditions for bulk carrier,and the loading conditions which determines the maximum longitudinal bending moment are analyzed for bulker carrier with or without fore/aft peak tank,respectively.208000 DWT bulk carrier which has been developed by MARIC is adopted as target ship in the paper.Focusing on optimizing longitudinal bending moment for bulk carrier,several typical methods are discussed,including modifying fore/aft peak tank to void tank,modifying upper/lower stools to ballast tanks,changing the location and facing of corrugated bulkhead,adjusting the volume distribution of fuel oil in cargo area and engine room area.Although optimizing longitudinal bending moment is the main target in this paper,more attention should pay to general arrangement of the vessel,loading condition,floating condition and rule requirements.Besides,the lightweight and weight center which affect longitudinal bending moment has also been analyzed,the following results can be used for reference in determining the margin of longitudinal bending moment for bulk carrier.