非完善加筋圆柱壳在外压和热荷载共同作用下的后屈曲

沈惠申

非完善加筋圆柱壳在外压和热荷载共同作用下的后屈曲

沈惠申

上海交通大学, 上海200030

详细信息

中图分类号: O343
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出版历程
- 收稿日期: 1996-09-16
- 修回日期: 1997-09-16
- 刊出日期: 1998-05-15

Postbuckling of Imperfect Stiffened Cylindrical Shells under Combined External Pressure and Heating

Shen Huishen

Shanghai Jiao Tong University, Shanghai 200030, P. R. China

摘要

摘要: 基于壳体屈曲的边界层理论,本文给出有限长加筋圆柱壳在侧向外压和均布热荷载共同作用下的后屈曲分析。分析中同时考虑壳体非线性前屈曲变形,大挠度和初始几何缺陷的影响。肋条的处理采用“平均刚度”法。采用奇异摄动方法导得壳体屈曲载荷关系曲线和后屈曲平衡路径,并给出完善和非完善,纵向加筋或环向加筋圆柱壳数值算例。
- 后屈曲 /
- 热后屈曲 /
- 加筋圆柱壳 /
- 复合加载 /
- 壳体屈曲边界层理论 /
- 奇异摄动法
Abstract: 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.
- postbuckling /
- thermal postbuckling /
- stiffened cylindrical shell /
- combined loading /
- a boundary layer theory of shell buckling /
- singular perturbation technique

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参考文献(6)

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[2]	D.Bushnell,Analysis of ring-stiffened shells of revolution under combined thermal and mechanical loading,AIAA J.9(3)(1971),401-410.
[3]	D.Bushnell and S.Smith,Stress and buckling of nonuniformly heated cylindrical and conical shells, AIAA J.,9(12)(1971),2314-2321.
[4]	沈惠申、陈铁云,圆柱壳在外压作用下屈曲的边界层理论,应用数学和力学,9(6)(1988),515-528.
[5]	H.S.Shen and T.Y.Chen,Aboundary layer theory for the buckling of thin cylindrical shells under axial compression,In Advances of Applied Mathematics and Mechanics in China,ed.by W.Z. Chien and Z.Z.Fu,Int.Academic Publishers,Beijing,China 2(1990),155-172.
[6]	H.S.Shen and T.Y.Chen,Buckling and postbuckling behaviour of cylindrical shells under combined external pressure and axial compression,Thin-Walled Structures,12(4)(1991),321-334.