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薄壁圆柱壳被广泛用于各种不同荷载组合的工业用途中。然而,很少有试验研究能够解释纯弯曲作用和外部压力下圆柱壳的实际性能。为了研究长圆柱钢壳在弯曲和统一外部压力下的屈曲性能进行相应的有限元模拟,并将结果与试验结果相比较。研究显示,在屈曲荷载和变形模式方面,根据非线性有限元分析预测出的理论结果与试验结果较为吻合。此外,由弯曲(特别是较高的弯曲值)所产生的初始环形截面对这种统一外部压力下的壳体的屈曲性能有较大影响。最后,提出一个相互作用公式来对研究范围内试验结果的相互作用性能进行概括。
Thin-walled cylindrical shells are widely used in industrial applications of various load combinations. However, few experimental studies can explain the net behavior of purely cylindrical shells under pure bending and external pressures. In order to study the buckling behavior of a long cylindrical steel shell under bending and uniaxial external pressure, a corresponding finite element simulation is carried out, and the results are compared with the experimental results. The study shows that the theoretical results predicted by the nonlinear finite element analysis are in good agreement with the experimental results in buckling load and deformation mode. In addition, the initial annular cross-section produced by bending, especially higher bending, has a greater influence on the buckling behavior of the shell under such uniform external pressure. Finally, an interaction formula is proposed to summarize the interactive performance of the experimental results within the scope of the study.