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在外部和轴向压力共同作用下,进行短、薄壁、低碳圆锥形钢壳的屈曲分析。将试验得到的等效圆柱形钢壳在轴压和表面压力下的屈曲结果与已有的圆锥钢壳在轴压和表面压力下的屈曲结果进行了对比。给出了数值和试验结果,以及试验、数值模型及承载能力的计算过程。研究结果表明,等效圆柱形钢壳的概念对于低度规圆锥并不适用。得到了关于高度规圆锥形壳和其等效圆柱形壳的稳定曲线。这些曲线不仅提供了强度包络,也得到了屈服包络和塑性区。研究优化了由Esslinger和vanIm-pe提出的设计工具,使之适用于外部压强下圆锥形壳的弹塑性屈曲分析。
Buckling analysis of short, thin-walled and low-carbon conical steel shells is carried out under external and axial compression. The buckling results of the equivalent cylindrical steel shells obtained under test under axial pressure and surface pressure are compared with the buckling results of the existing conical steel shells under axial pressure and surface pressure. The numerical and experimental results, as well as the calculation of the test, numerical model and carrying capacity are given. The results show that the concept of an equivalent cylindrical shell is not suitable for low gauge cones. A stable curve is obtained for the conic shell and its equivalent cylindrical shell. These curves not only provide an intensity envelope, but also give yield envelopes and plastic zones. The design tool optimized by Esslinger and van Im-pe was optimized for elastoplastic buckling analysis of conical shells under external pressure.