加筋薄壳结构分析与优化设计研究进展

伴随装备大型化和承载重型化等发展趋势,装备中加筋薄壳结构尺寸越来越大,成型工艺与结构细节也越来越复杂,对结构优化设计的精细程度、新型轻质结构发现和力学性能数值预测精度提出了更高的要求,给复杂板壳非线性分析模型、优化问题的数学建模和求解算法带来新的挑战。本文从加筋壳稳定性分析方法、折减因子确定方法以及考虑几何缺陷的加筋壳设计方法三个方面进行综述,介绍国内外相关研究进展。

Recent advances in structural analysis and optimization of stiffened shells

Due to the high specific strength and stiffness,stiffened shells have been widely used in the high-end equipment of launch vehicles,missiles,aircraft and submarines.Because of their increasing sizes and loads of these equipment,the dimensions of stiffened shells used become larger and larger,and corresponding manufacturing processes and structural characteristics become more and more complicated.In this case,higher requirements are put forward for increasing the analysis fidelity of the structure optimization,developing innovative lightweight structural configurations and improving the prediction accuracy of the mechanical properties.Therefore,it will challenge the nonlinear analysis methods,mathematical modeling of optimization problems and optimization algorithms for complex plates and shells.This study reviews the stability analysis method of stiffened shells,the solution methods of knockdown factors,and designs of stiffened shells considering geometrical imperfections,and the research progress of related studies at home and abroad.