本文的研究是以“九五”国家科技攻关专题“快堆主钠池堆芯抗震性能的安全评价方法研究”中的抗屈曲研究子课题为背景展开的。所用模型简化自中国实验快堆钠池主容器,是由薄壁圆柱壳和多个加劲肋结合而成的组合圆柱壳体。本文分别采用...本文的研究是以“九五”国家科技攻关专题“快堆主钠池堆芯抗震性能的安全评价方法研究”中的抗屈曲研究子课题为背景展开的。所用模型简化自中国实验快堆钠池主容器,是由薄壁圆柱壳和多个加劲肋结合而成的组合圆柱壳体。本文分别采用大型有限元程序ANSYS 5.4和ALGOR FEAS(SUPER SAP 93),对该壳体进行了常温时水平、轴向荷载共同作用下静态屈曲的计算,同时考虑了诸如塑性、边界条件及初始缺陷等因素的影响。并进行了相关实验研究,最后将有限元计算结果与实验所获得的静屈曲荷载进行比较,结果吻合较好。展开更多
posthuckling analysis is presented for the stilTened cylindrical shell of finite length subjected to combined loading of external liquid pressure and axial compression. The formulations are based on a boundary layer t...posthuckling analysis is presented for the stilTened cylindrical shell of finite length subjected to combined loading of external liquid pressure and axial compression. The formulations are based on a boundary layer theory of shell buckling, which includes the effects of nonlinear prebuckling deformations, nonlinear large deflections in the postbuckling range and initial geometrical imperfections of the shell. The 'smeared stifl'cner' approach is adopted for the stiffencrs. In the analysis a singular perturbation technique is used (o determine the interactive buckling loads and the postbuckling paths. Numerical examples cover the performance of perfect and imperfect, stringer and ring stiffened cylindrical shells. Typical results arc presented in the dimcnsionless graphical form.展开更多
A postbuckling analysis is presented for a stiffened cylindrical shell of finite length subjected to combined loading of external pressure and a uniform temperature rise. The formulations are based on a boundary layer...A postbuckling analysis is presented for a stiffened cylindrical shell of finite length subjected to combined loading of external pressure and a uniform temperature rise. The formulations are based on a boundary layer theory of shell buckling, which includes the effects of nonlinear prebuckling deformations, nonlinear large deflections in the postbuckling range and initial geometrical imperfections of the shell. The 'smeared stiffener' approach is adopted for the stiffeners. The analysis uses a singular perturbation technique to determine the interactive buckling loads and the postbuckling equilibrium paths. Numerical examples cover the performances of perfect and imperfect, stringer and ring stiffened cylindrical shells. Typical results are presented in dimensionless graphical form.展开更多
文摘本文的研究是以“九五”国家科技攻关专题“快堆主钠池堆芯抗震性能的安全评价方法研究”中的抗屈曲研究子课题为背景展开的。所用模型简化自中国实验快堆钠池主容器,是由薄壁圆柱壳和多个加劲肋结合而成的组合圆柱壳体。本文分别采用大型有限元程序ANSYS 5.4和ALGOR FEAS(SUPER SAP 93),对该壳体进行了常温时水平、轴向荷载共同作用下静态屈曲的计算,同时考虑了诸如塑性、边界条件及初始缺陷等因素的影响。并进行了相关实验研究,最后将有限元计算结果与实验所获得的静屈曲荷载进行比较,结果吻合较好。
文摘posthuckling analysis is presented for the stilTened cylindrical shell of finite length subjected to combined loading of external liquid pressure and axial compression. The formulations are based on a boundary layer theory of shell buckling, which includes the effects of nonlinear prebuckling deformations, nonlinear large deflections in the postbuckling range and initial geometrical imperfections of the shell. The 'smeared stifl'cner' approach is adopted for the stiffencrs. In the analysis a singular perturbation technique is used (o determine the interactive buckling loads and the postbuckling paths. Numerical examples cover the performance of perfect and imperfect, stringer and ring stiffened cylindrical shells. Typical results arc presented in the dimcnsionless graphical form.
文摘A postbuckling analysis is presented for a stiffened cylindrical shell of finite length subjected to combined loading of external pressure and a uniform temperature rise. The formulations are based on a boundary layer theory of shell buckling, which includes the effects of nonlinear prebuckling deformations, nonlinear large deflections in the postbuckling range and initial geometrical imperfections of the shell. The 'smeared stiffener' approach is adopted for the stiffeners. The analysis uses a singular perturbation technique to determine the interactive buckling loads and the postbuckling equilibrium paths. Numerical examples cover the performances of perfect and imperfect, stringer and ring stiffened cylindrical shells. Typical results are presented in dimensionless graphical form.
