The catenary system of a high speed train is designed to have a flexibility to ensure the contact with a pantograph during high speed running. The flexibility brings a vibration inevitably. The vibration is transferred to a utility pole through brackets. Therefore, the examination of dynamic load at the bracket due to train running is necessary for the design of the bracket. In this research, an equation of motion is derived to calculate the dynamic load at the bracket during high speed running and a computer program is developed. Also, the calculated results are compared to characterize the dynamic load at the bracket.
ρ
∞
∞
∞
∞
∞
∞
∞
δ
∞ ∞
∞
에서
∞
T1
T1
T2
T2
T1
T1
T2
T2 K KK
K T1 KKKK
T1
T2
T2
T1
T1
T2
T2 K KK
K KKKK
△
여기서, △
△
△ △
△ △
P0
1 M
) ( t Pm
)
1(t Y
2
M Y2(t) K 1
3 M
K 2
C 3
)
3(t Y
P0
1 M
) ( t Pm
)
1(t Y
2
M Y2(t) K 1
3 M
K 2
C 3
)
3(t Y
0 20 40 60 80 100 120
V=1 00 V=2 00 V=3 00
Run ning speed (km/ h)
Displacementofmax.(mm)
k=1 k=1 0 k=1 00
0 20 40 60 80 100 120
k=1 k=1 0 k=1 00
Sti ffnes s of brack et (k N/m)
Displacementofmax.(mm)
V=1 00 V=2 00 V=3 00
0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 3 5 0 4 0 0 4 5 0 5 0 0
V = 1 0 0 V = 2 0 0 V = 3 0 0
R u n n i n g s p e e d ( k m / h )
Contacforceofmax.(N)
k=1 k=1 0 k=1 00
0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 3 5 0 4 0 0 4 5 0 5 0 0
k = 1 k = 1 0 k = 1 0 0
S t i f f n es s o f b r a c k e t ( k N / m )
Contacforceofmax.(N)
V=1 00 V=2 00 V=3 00
