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Change of the first-order out-of-plane vibration mode for A(0)/h varying in a wide range: (a–d) vibration modes for A(0)/h=0.25, 0.5, 1.0 and 2.5, respectively. Both the results of precise and simplified models are presented for comparison. To illustrate the vibration mode, two phases corresponding to the largest amplitudes during vibration are shown, i.e. green: phase 0°, gray: phase 180°.
