817384.fig.006a
(a)
817384.fig.006b
(b)
817384.fig.006c
(c)
817384.fig.006d
(d)
817384.fig.006e
(e)
817384.fig.006f
(f)
Figure 6: The mode shapes of the (a) first, (b) second, (c) third, (d) fourth, (e) fifth, and (f) sixth natural frequencies.