Nonlinear stability analysis of rotationally-restrained imperfect doubly-curved composite shallow shells

被引:12
|
作者
Huang, Sixin [1 ]
Qiao, Pizhong [1 ,2 ]
Lu, Linjun [1 ]
Qi, Yang [1 ]
机构
[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Collaborat Innovat Ctr Adv Ship & Deep Sea Explor, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China
[2] Washington State Univ, Dept Civil & Environm Engn, Sloan Hall 117, Pullman, WA 99164 USA
基金
中国国家自然科学基金;
关键词
Nonlinear stability analysis; Doubly-curved shells; Laminated composites; Imperfection; Arc-length method; POST BUCKLING ANALYSIS; SHEAR-DEFORMABLE FLAT; POSTBUCKLING BEHAVIOR; ELASTIC FOUNDATIONS; FREE-VIBRATION; ARC-LENGTH; PANELS; PLATES;
D O I
10.1016/j.tws.2019.05.008
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The semi-analytical solution for nonlinear stability analysis of imperfect doubly-curved laminated composite shallow shells with rotationally-restrained edges and under in-plane loading is presented. The nonlinear governing equations are established using the Galerkin method, and the arc-length and quadratic control method is implemented to capture the snapping phenomenon of the doubly-curved composite shells. The nonlinear load-displacement relationships of four special curvature radii of doubly-curved shell structures are obtained, and they are compared and validated with the numerical finite element solutions. A parametric study is conducted to evaluate the effects of the initial imperfection, edge rotationally-restrained spring stiffness, various load parameters, and curvature radius on the nonlinear stability behavior of doubly-curved shells. Finally, the computational efficiency and capability of the semi-analytical solution are demonstrated in comparison with the finite element analysis. The present semi-analytical solution can be effectively and efficiently used in simplified nonlinear stability analysis of complex doubly-curved composite shallow shells with periodic and restrained boundary conditions.
引用
收藏
页码:358 / 368
页数:11
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