21 Study on Vibration Characteristics of Metro Bogie …
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(a) Root of traction rod seat, longitudinal
(b) End of traction rod seat, longitudinal
(c) Root of traction rod seat, transverse
(d) End of traction rod seat, transverse
(e) Root of traction rod seat, vertical
(f) End of traction rod seat, vertical
1750.0
2050.0
1800
1900
2000
Linear
s
0
1000
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
150.0
250.0
350.0
450.0
550.0
650.0
750.0
850.0
60.0
940.0
Linear
Hz
484e-9
0.30
0.10
0.20
0.05
0.15
0.25
Amplitude
g
1750.0
2050.0
1800
1900
2000
1820 1840 1860 1880
1920 1940 1960 1980
1820 1840 1860 1880
1920 1940 1960 1980
Linear
s
0
1000
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
150.0
250.0
350.0
450.0
550.0
650.0
750.0
850.0
60.0
940.0
Linear
Hz
646e-9
0.30
0.10
0.20
0.05
0.15
0.25
Amplitude
g
1750.0
2050.0
1800
1900
2000
Linear
s
0
1000
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
150.0
250.0
350.0
450.0
550.0
650.0
750.0
850.0
60.0
940.0
Linear
Hz
109e-9
0.30
0.10
0.20
0.05
0.15
0.25
Amplitude
g
1300.0
2050.0
1820 1840 1860 1880
1920 1940 1960 1980
1400
1500
1600
1700
1800
1900 1960
Linear
s
0
1000
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
150.0
250.0
350.0
450.0
550.0
650.0
750.0
850.0
60.0
940.0
Linear
Hz
305e-9
0.30
0.10
0.20
0.05
0.15
0.25
Amplitude
g
1750.0
2050.0
1800
1900
2000
Linear
s
0
1000
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
150.0
250.0
350.0
450.0
550.0
650.0
750.0
850.0
60.0
940.0
Linear
Hz
545e-9
0.30
0.10
0.20
0.05
0.15
0.25
Amplitude
g
1750.0
2050.0
1800
1900
2000
1820 1840 1860 1880
1920 1940 1960 1980
1820 1840 1860 1880
1920 1940 1960 1980
Linear
s
0
1000
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
150.0
250.0
350.0
450.0
550.0
650.0
750.0
850.0
60.0
940.0
Linear
Hz
801e-9
0.30
0.10
0.20
0.05
0.15
0.25
Amplitude
g
600-700hz longitudinal characteristic
frequency
800 Hz natural frequency
500 Hz natural frequency
370 Hz natural frequency
200 Hz natural frequency
450 HZ speed-related frequency
Fig. 21.10 Time-frequency diagram of traction rod seat root-end (Motor normal)
rod seat, among which, 200 Hz natural frequency, 370 Hz natural frequency, 500 Hz
natural frequency and 800 Hz natural frequency are more obvious in the vertical
direction of the end; for the speed-related frequency of about 450 Hz, this frequency
is related to the torque output of the motor and the frequency disappears after the
motor is removed; the 600–700 Hz frequency band is more obvious in the longitudinal
direction of the end, both when the motor is normal or removed. Each characteristic
frequency exists at both root and end, and the energy amplitude at the end is larger.