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

Abstract

Due to the good load carrying capacity and designability,the stiffener design and buckling analysis of stiffened spherical shell structure have always been the classic and challenging problems.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.The accuracy of the model is verified by comparing with literature data.Using the critical buckling pressure and the critical buckling pressure to weight ratio as the 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 results show that the given method can improve the finite element modeling efficiency.The circumferential stiffener is of more significant influence on the overall buckling of the structure,while the influence of longitudinal 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.

Keywords

• parametric modeling
• secondary development of abaqus
• stiffened spherical shell structure
• buckling analysis
• numerical simulation