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研究平面内剪力作用下曲面板的屈曲和后屈曲性能。回顾经典的弹性屈曲分析,通过对几何和材料非线性的分析,模拟了弹塑性后屈曲性能、及曲率参数和长宽比的影响。通过各种不同大小和级别的缺陷的影响分析,研究缺陷敏感度。随着曲率的增大,弹性临界荷载增大,并且产生不稳定屈曲现象,以及使后屈曲承载力储备减少。微小的初始缺陷都会引起较大曲率的曲面板的初始屈曲,但是几乎不会影响板的极限承载力。
The buckling and post-buckling behavior of curved plates under in-plane shearing force are studied. The classical elastic buckling analysis is reviewed. The effects of elastic-plastic post-buckling performance, curvature parameters and aspect ratio are simulated through the analysis of geometrical and material nonlinearities. Defect sensitivity is investigated by impact analyzes of various sizes and levels of defects. With the increase of curvature, the elastic critical load increases, and the instability buckling phenomenon occurs, and the reserve of post-buckling capacity decreases. Tiny initial imperfections cause the initial buckling of curved panels of greater curvature, but hardly affect the ultimate bearing capacity of the panel.