Research Article

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

Table 1

Dimensionless free vibration frequencies of the onefold laminated plate with the lamination scheme (0°/90°/90°/0°).

Crank angleModesPresent resultsANSYS resultsRelative errors

= 90°18.91288.890370.25%
210.097710.065760.32%
312.927612.876950.39%
413.822413.776920.33%
528.83628.704470.46%

= 150°18.913258.891210.25%
210.103610.066590.37%
312.900812.85080.39%
413.789413.744650.33%
528.84128.710030.46%