Page 550 - Fluid-Structure Interactions Slender Structure and Axial Flow (Volume 1)

520 SLENDER STRUCTURES AND AXIAL FLOW

10
0
05
h
9 -20
v h 00
L
: -40
a
-a 45
eo -60
VI
-80 -1 0
5 0 1 2 3 4 5
Frequency (Hz) S
(a) (b)
600 -100 0
400
200
G- h
+ o
v
-200
-8
-400 -400
400 -10
400 0 600 0 600 -7 4 -5 -4 -3 -2 -1 0
x(n) x(n + 5) In r
(C) (4

Figure 1.2 As in Figure 1.1, but for U = 7.27 ds.

1 .o
0 0.5
-
h
g -20
. 4 2 0.0
- 40
a
m 4.5
2 -60
-80 -1.0
0 5 10 15 20 25 0 1 2 3 4 5
Frequency (Hz) S
(a) (b)
600
400
200
G-0
5 -200
-400
-600
-800
400 0 600 0 500 -7 -6 -5 -4 -3 -2 -1 0
x(n + 5) In r
(4
Figure 1.3 As in Figure 1.1, but for U = 7.47 ds.