Improved Genetic Algorithm with Two-Level Approximation Method for Laminate Stacking Sequence Optimization by Considering Engineering Requirements

Table 9

Redesigned stacking sequence results.

	Laminate; Co: conic part; Cy: cylindrical part	Plies	Weight of main cylinder, kg	, Hz	Critical buckling factors
					Case	45/−45/902/s; 45/−45/02/45/−45/0s	(Cy)—09; (Co)—14	3.110	17.361	1.9392	1.5705	1.9589	1.5188
Case	902/45/−45s; 0/453/−453/02s	(Cy)—08; (Co)—18	3.434	17.576	1.9129	1.5794	1.9457	1.4702
Case	90/452/−452s; 0/452/−452/02s	(Cy)—10; (Co)—14	3.268	17.903	1.8887	1.6462	1.9672	1.5914
Case	45/−45/902/s; 0/45/−45/0/45/−45/0s	(Cy)—09; (Co)—14	3.110	17.361	1.9081	1.7142	1.9920	1.6837
Case	45/−45/902/s; 453/−453/02s	(Cy)—09; (Co)—16	3.351	17.417	2.0974	1.7528	2.1539	1.6881