The Modeling Method for Vibration Characteristics Analysis of Composite-Laminated Rotationally Stiffened Plate

Figure 11

The change curve of frequency parameter Ω varies with rotation angle ϑ of stiffened composite circular sector plate under different boundary conditions. (a) First order. (b) Second order. (c) Third order. (d) Fourth order.

(a)

(b)

(c)

(d)