POWER SPECTRAL DENSITY 
INPUT: 1 WAVE 
-20.00 
o 
oa 
2 
= 
@ ~40.00 
2 
w 
fa} 
60.00 
0.00 1.00 2.00 
FREQUENCY 
CROSS SPECTRAL DENSITY 
REAL PART 12 
0.09 
e 
= 
= 0.03 
on 
z 
w 
oa 
-0.03 
0.00 1.00 2.00 
FREQUENCY 
FREQUENCY: RESPONSE FUNCTION 
INOUT: 1 WAVE 
OUTPUT: 2 SURGE 
N=250 
H=100 
20.00 
a 
oO 
Z -0.00 
2 
< 
© 
-20.00 
0.00 1.00 2.00 
FREQUENCY 
1.00 
w 
c 
Ww 
=x 
5 
oO 
ee oe 
0.00 1.00 2.00 
FREQUENCY 
DENSITY IN OB 
DENSITY (X10!) 
PHASE (DEG. ) (X10') 
POWER SPECTRAL DENSITY 
OUTPUT: 2 SURGE 
10.00 
-10.00 
-30.00 
-50.00 
0.00 1.00 2.00 
FREQUENCY 
CROSS SPECTRAL DENSITY 
IMAG. PART 1 2 
0.09 
0.04 
-0.02 
0.00 1.00 2.00 
FREQUENCY 
54.00 
18.00 
-18.00 
-54.00 
0.00 1.00 2.00 
FREQUENCY 
Fig. 7.17. Frequency response analysis for surge by AR—model 
fitting (N=250, At=0.2 sec, AR—11). 
(From Oda, Yamanouchi, et al.5°) 
