76000DWT散货船浮箱载船下水研究

浮箱载船下水是船舶下水方式之一,浮箱载船下水过程中,浮箱的安全是保证船舶安全下水的关键因素,因此,对浮箱安全的评估显得特别重要。对76000 DWT散货船浮箱载船下水和支墩刚度的计算进行了较详细的研究,计算结果显示下水过程中的浮箱的总纵强度和稳性满足许可要求,此船浮箱载船下水工艺可以指导其他船舶浮箱载船下水。

抬船浮箱载船下水总纵强度计算分析

论述了抬船浮箱载船下水方式,采用结构有限元分析方法对抬船浮箱载船起浮驳运下水过程中的总纵强度进行了计算及浮态计算。通过计算分析,提出了具有使用价值的建议,为确保22000m3液化气船在不同搭载状态下抬船浮箱载船下水的安全提供了技术支撑。

舰船载船浮箱下水的结构分析与优化

载船浮箱下水是一个技术复杂且事故因素较多的工艺过程。运用整船三维有限元分析方法评估首次采用载船浮箱下水方式的万吨级舰船在深水坞内边墩、尾部支墩拆除后的结构安全性。通过多种工艺方案的对比分析、反复优化和理论验证,提出了船体、支撑系统和浮箱的加强设计方案,已成功应用于实船,保证了该产品安全、可靠、稳妥的下水。

37500m^3乙烯运输船C型罐的层压木受力分析

在设置有Type C双耳型液罐的液化气体运输船的研制中,液货舱支撑系统的设计和建造是一项关键技术。基于37500m3乙烯运输船层压木裂纹的监测数据,通过数值计算分析层压木本体在航行和下水两种状态下产生裂纹的原因及其影响。采用三维势流理论计算舱段模型在等效设计波载荷作用下的鞍座应力和层压木受力,并提出了一种适用于载船浮箱下水计算的混合模型分析方法。计算结果可为该支撑系统的优化设计提供技术支撑。

Research on optimization of valve open time of the launch barge's ballast tanks

Launch barge is an effective tool for transporting ship segments from one place to another in shipyards. During shifting of segments onto a barge, the slideway on the barge＇s deck must be adjusted to maintain the same level as the wharf and also the barge must be kept level by adjusting the water in the ballast tanks. When to open the adjusting valves is an important factor influencing the barge＇s trim during the water-adjustment process. Because these adjustments are complex a mathematical model was formulated,after analyzing the characteristics of the process of moving the segments onto the barges deck, and considering the effects of this movement＇s speed and variations in tidal levels during the move. Then the model was solved by the penalty function method, the grid method, and improved simulated annealing, respectively. The best optimization model and its corresponding solution were then determined. Finally, it was proven that the model and the method adopted are correct and suitable, by calculating and analysing an example.