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

Table 2

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

Crank angle	Modes	Present results	ANSYS results	Relative errors
= 90°	1	10.5522	10.48862	0.61%
	2	15.7311	15.63222	0.63%
	3	19.2923	19.11888	0.91%
	4	22.6269	22.45392	0.77%
	5	35.233	34.9528	0.80%
= 150°	1	10.5784	10.49001	0.84%
	2	15.4292	15.32843	0.66%
	3	19.5467	19.09968	2.34%
	4	21.6468	21.4844	0.76%
	5	35.3159	34.97227	0.98%