摘要
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。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、加强筋截面尺寸等参数对铝合金加筋球壳屈曲的影响。结果表明:本文给出的方法提高了有限元建模效率;纬向筋对结构整体屈曲的影响较为显著,而经向筋的影响则并不明显;增加球壳厚度与加强筋截面高度也能有效提高加筋球壳结构的屈曲性能。
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.
作者
彭宇辰
陈秀华
吴亚东
PENG Yuchen;CHEN Xiuhua;WU Yadong(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《航空工程进展》
CSCD
2022年第5期123-130,170,共9页
Advances in Aeronautical Science and Engineering
关键词
参数化建模
ABAQUS二次开发
加筋球壳结构
屈曲分析
数值模拟
parametric modeling
secondary development of ABAQUS
stiffened spherical shell structure
buckling analysis
numerical simulation
