Free and Forced Vibration Analysis in Abaqus Based on the Polygonal Scaled Boundary Finite Element Method

Table 2

The first four natural frequencies (Hz) of a multihole panel.

Method	Natural frequencies (Hz)				Relative error norm (%)
	Mode 1	Mode 2	Mode 3	Mode 4
Reference solutions	31.811	150.19	209.31	330.64	—
FEM	31.916	151.15	210.03	333.40	0.54
PSBFEM	31.992	151.66	210.07	334.93	0.80