基于ABAQUS的加筋球壳参数化建模及屈曲分析

加筋球壳结构由于良好的承载能力和可设计性，其加筋设计及屈曲分析一直是经典且具有挑战性的问题。本文给出基于ABAQUS 的加筋球壳的参数化有限元建模方法，建立加筋球壳的参数化有限元模型；通过与文献数据进行比较对模型的准确性进行验证；以临界屈曲压力和临界屈曲压力与重量的比值为主要指标，研究球壳厚度，加强筋布局，加强筋截面尺...

Parametric Modeling and Buckling Analysis of Stiffened Spherical Shell Based on ABAQUS

Due to the good pressure capacity and designability, the stiffener design and buckling analysis of stiffened spherical shell have always been classic and challenging problems. In this paper, the parametric finite element modeling method of stiffened spherical shell based on ABAQUS is given, and the parametric finite element model of the stiffened spherical shell is established, which greatly improves the efficiency of the finite element modeling.. The accuracy of the model is verified by comparing with literature data. Using the critical buckling pressure Pc and the critical buckling pressure to weight ratio Pc/W as main indexes, the influence of shell thickness, stiffener layout, stiffener section size and other parameters on the buckling of aluminum alloy stiffened spherical shell is studied. The finite element analysis results show that circumferential stiffener has more significant influence on the overall buckling of the structure, while the influence of meridional stiffener is not obvious. Increasing the shell thickness and the section height of the reinforcement can also effectively improve the buckling performance of the stiffened spherical shell.