Fig. 6

The variations of the first four natural frequencies of the laminated plate-ITC coupled system with the inclination angle ψ. (a) [15°/− 15°/15°], (b) [30°/-30°/30°], (c) [45°/− 45°/45°], (d) [0°/90°/0°].
The variations of the first four natural frequencies of the laminated plate-ITC coupled system with the inclination angle ψ. (a) [15°/− 15°/15°], (b) [30°/-30°/30°], (c) [45°/− 45°/45°], (d) [0°/90°/0°].