DENSITY IN DB 
DENSITY IN DB 
GAIN (IN DB) 
PHASE (DEG.) (X10!) 
POWER SPECTRAL DENSITY CROSS SPECTRAL DENSITY 
OUTPUT: 2 HEAVE REAL PART 1 2 
POWER SPECTRAL DENSITY CROSS SPECTRAL DENSITY 
OUTPUT. 2 HEAVE REAL PART 1 2 
0.05 -20.0 —~ 0.05 
— o “Tr 
= I = = | 
> 0.02 = 0.04 / = 002 
: — : : 
0.01 60.0 001 
0.00 0.50 1.00 0.00 0.50 7.00 0.00 0.50 1,00 0.00 0.50 1.00 
FREQUENCY FREQUENCY FREQUENCY FREQUENCY 
CROSS SPECTRAL DENSITY CROSS SPECTRAL DENSITY 
POWER SPECTRAL DENSITY IMAG. PART 1 2 POWER SPECTRAL DENSITY IMAG PART 1 2 
INPUT: 1 WAVE INPUT: 1 WAVE 
= 004 N = 0.05 
© fe S 
x | oc -30 = 
S| : : 
-30.0 = o0e | > zB 001 
2 ral z 
ra | Fa Ta) 
co 
-50.0 0.00 -50 -0.02 
000 050 1.00 0.00 050 1.00 0.00 0.50 1.00 0.00 050 1.00 
FREQUENCY FREQUENCY FREQUENCY FREQUENCY 
POWER AND CROSS POWER SPECTRUM 
POWER AND CROSS POWER SPECTRUM 
FREQUENCY RESPONSE FUNCTION 
FREQUENCY RESPONSE FUNCTION INPUT: 1 WAVE 
INPUT: 1 WAVE OUTPUT. 2 HEAVE 
OUTPUT: 2 HEAVE N= 225 
N=225 
H=50 
Fy 
5 ~0.00 
2 
g z 
° z 
j S  -20.00 
0.00 050 1.00 
sey FREQUENCY 
0.00 050 1.00 
FREQUENCY 
54.00 om 
S 
18.00 x 18.00 
ce ny 
-18.00 = 100 S S100 
: 3 ~18.00 5 
° z - 
o.00, 5 0.00 4 3 0.00 
0.00 O80. 00 3 000 0501.00 Spi as = 050 1.00 
FREQUENCY PaRSYEN Ey FREQUENCY 
FREQUENCY RESPONSE AND COHERENCY 
FREQUENCY RESPONSE AND COHERENCY 
FREQUENCY RESPONSE FUNCTION 
FREQUENCY RESPONSE FUNCTION aN REE 
OUTPUT: 2 HEAVE Ne 225 
Nw#225 
H=50 
3 
-1.50 090 0.30690: 1.50 
& 
ot ' 
L 
3! 
FREQUENCY RESPONSE ANALYSIS BY NON-PARAMETRIC METHOD FREQUENCY RESPONSE ANALYSIS BY AR MODEL 
(a) Nonparametric method (max. lag = 50). (b) AR—model fitting method (order n=11). 
Fig. 7.10. Comparison of methods to analyze the frequency response characters 
of a model ship in the tank — sample 1. 
(From Yamanouchi, et al.4°) 
23H 
