中文摘要：

基于气囊下水过程受力分析及气囊囊体力学特性，将气囊下水运动过程分析与全船有限元分析方法相结合，研究了气囊下水工艺船体强度分析中载荷及边界条件的特征。二次开发了加载的PCL程序并提出了一种等效约束方式，对某57000DWT散货船的气囊下水过程进行了强度计算与惯性释放方法做了比较，验证其可靠性。并提出一种计入船体挠度与气囊压缩量的相互影响的准静定算法；分析了船体与气囊接触面宽度的影响，获得有益结论。

英文摘要：

Basing on the mechanics analysis of lauching with airbags and mechanical property of airbags, combining the process analysis and the finite element method, it is studied the feature of loads and the boundary conditions in strength analysis in ship lauching with airbags. The loaded PCL program is developed for the second time and a constraining method is presented The results of the strength calculation and those of inertia relief method during the lauching process by airbags of a bulk carrier with 57000DWT are compared The realiabiliO~ is verified A quasi-static algorithm is presented with the mutual influence of structure deformation and loads of airbags. The impact of the interface broadth between the hull and the airbags is analyzed and get helpful conclusions.