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航空轻量化结构的设计与制造目前是航空工业与学术界研究的热点问题。引入了金属次加筋板的概念,简要阐述了其定义与研究进展。对引入次加筋之后,加筋板可能出现的新的屈曲模态进行了探讨。利用有限元软件ABAQUS建立了次加筋板模型,分析了线性屈曲性能,并与文献中的试验数据进行对比,验证了有限元模拟的有效性。最后建立了针对次加筋结构的优化框架,在等重情况下,对次加筋结构的位置与尺寸进行优化,得到了临界屈曲载荷与极限承载能力都优于原始设计的优化结构设计。结果表明,次加筋板作为对传统加筋板的一种改进,拓展了设计空间,并能够有效提升传统加筋板的稳定性能,值得航空工业进一步研究。
The design and manufacture of aviation lightweight structure is currently a hot issue in the field of aviation industry and academia. The concept of metal secondary stiffened panels was introduced, and its definition and research progress were briefly described. After the introduction of sub-reinforcement, stiffeners may appear new buckling modes were discussed. The finite element software ABAQUS was used to establish the sub-stiffened slab model, and the linear buckling performance was analyzed. Compared with the experimental data in the literature, the validity of the FEM simulation was verified. Finally, an optimization framework for the secondary stiffened structure was established. Under the condition of equal weight, the position and size of the secondary stiffened structure were optimized, and the optimal structural design with both the critical buckling load and the ultimate load carrying capacity was superior to the original design. The results show that the sub-stiffened plate, as an improvement on the traditional stiffened plate, expands the design space and can effectively improve the stability of the traditional stiffened plate, which deserves further study in the aviation industry.