大型船船台下水时艏部强度计算分析

Calculation and analysis of king-size tanker stem structure for launching strength

对大型船船台下水时艏部所受墩木支反力的分布形式及不同分布形式对结构的影响作了计算分析.通过分析实船下水资料,得出艉浮中期典型的受力分布形式.用PATRAN/NSTRAN软件建立有限元模型,将墩木支反力的分布形式加载到有限元模型上进行计算,得出结构的应力响应和变形,校核是否满足要求,对下水船局部结构的安全性进行预报.

The distribution of force between the stem and the shipway and its effect on the structure are calcuat-ed and analysed to establish the typical distribution forms during stem floating. The force are loaded onto the FEM model according to their distribution using sofware PATRAN/NASTRAN , and the values and fringes of stress and deformation are used to predict the security of structure.