Influence of Initial Imperfections on PMMA Spherical Shell

Table 2

The worst mode of the spherical shell under different defect amplitudes.

	The worst buckling mode
Defect	5	10	15	20	25	30	35	40	45	50
Complete spherical shell	2	2	3	3	3	3	3	1	7	6
Single penetration	1	1	1	1	1	1	1	2	18	6
Double penetration	2	2	2	2	2	2	2	1	1	1
Hyperspherical shell	2	4	4	4	4	4	4	3	12	12