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针对在新型制造技术背景下的航空轻量化结构发展,提出了次级加筋结构3种可能的形式,并对金属次加筋结构的稳定性问题进行了数值计算与优化研究。基于多学科优化软件ModelCenter与有限元(FEM)软件ABAQUS建立了金属次加筋结构优化设计的软件框架,利用粒子群优化(PSO)算法对各形式下次加筋结构的参数配置进行优化。分析了各形式的优化结构在单轴压载作用下,次加筋板对传统加筋板临界屈曲载荷以及极限承载能力的增益效果。结果表明,引入次加筋结构使传统加筋板的稳定性能与极限承载能力提升明显,对于适应新制造技术的航空轻量化结构设计有一定参考价值。
Aiming at the development of aviation lightweight structure in the context of new manufacturing technology, three possible forms of secondary stiffened structure are proposed. The stability and stability of metal secondary stiffened structure are numerically calculated and optimized. Based on multidisciplinary optimization software ModelCenter and finite element (FEM) software ABAQUS, a software framework for the optimization design of metal sub-stiffened structures was established. Particle swarm optimization (PSO) algorithm was used to optimize the parameter configuration of the next stiffened structure. The effect of the sub-stiffened plate on the critical buckling load and the ultimate bearing capacity of the traditional stiffened plate under uniaxial ballasting is analyzed. The results show that the introduction of sub-stiffened structure makes the stability and ultimate bearing capacity of the traditional stiffened plate increase obviously, which is of certain reference value for the design of light weight aviation structure adapting to the new manufacturing technology.