Free Vibration Analysis of Symmetrically Laminated Folded Plate Structures Using an Element-Free Galerkin Method

Table 4

Dimensionless free vibration frequencies of the cantilevered onefold laminated plate with the lamination scheme (−45°/45°/−45°/45°/−45°…)₁₀.

Crank angle	Modes	Present results	ANSYS results	Relative errors
= 90°	1	5.19091	5.16586	0.48%
	2	6.37998	6.35766	0.35%
	3	15.5232	15.42413	0.64%
	4	18.0588	17.93153	0.71%
	5	20.3733	20.27757	0.47%
= 150°	1	5.23049	5.16336	1.30%
	2	6.30941	6.27921	0.48%
	3	15.6594	15.4258	1.51%
	4	17.6398	17.50867	0.75%
	5	20.2856	20.15211	0.66%