[Retracted] Free Vibration Analysis of Thick Rectangular and Elliptical Plates with Concentric Cut-Out

Figure 3

Aspect ratio variation of nondimensional eigenvalues. (a) Aspect ratio a/b = 0.4 and h/b = 0.2. (b) Aspect ratio a/b = 0.8 and h/b = 0.2. (c) Aspect ratio a/b = 1 and h/b = 0.2. (d) Aspect ratio a/b = 1.5 and h/b = 0.2. (e) Aspect ratio a/b = 2 and h/b = 0.2.

(a)

(b)

(c)

(d)

(e)