The Mechanism of Aeroelastic Vibration on 2-Edge-Girder Bridge by Computational Fluid Dynamics
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Transcript of The Mechanism of Aeroelastic Vibration on 2-Edge-Girder Bridge by Computational Fluid Dynamics
11rb901 Soulachack SOUKSIVONGXAY
The Mechanism of Aeroelastic Vibration on 2-Edge-Girder Bridge by Computational Fluid Dynamics
1
Alex fraser460m1986
423m1991
260m2005192.6m2010
Alex fraser460m1986260m2005192.6m2010
wind
CFD
CFD
2000
2DBD=10DCB 1DOF
SIM
Re32300t0.005s2910034200Mesh2.5,5,10,25mm
60D2DRANSk-40D
SlipU0,V=0
P=0
Mesh
MeshMeshMesh
No-slipU=V=0
RANS
SlipU0,V=0D
K-
(Overset MeshNo-slip(U=V=0)DB40D10D60D20D
Moving
2DRANSOverset Meshing Method
C 1DOF 1DOF
Moving
SlipU0,V=0
P=000.513y00.1D2.5Dt0.005s2910034200Mesh2.5,5,10,25mm
Mesh
MeshMesh
Mesh
SlipU0,V=02
-BD=10
: CD=0.5: CD=2.0
: CD=0.5CFD2DRe=32300: CD=2.0CFD2DRe=32300
DC
B
1DOF&1968
CD=0.5
:DC
(CD=2.0)(CD=0.5)>CD
DCB
- 1DOF
CD=0.52DCD=0.5
BD=10
Smooth Flow:
PIVVelocity(m/s)
1DOF
DCBBD=10
Smooth Flow:
CD=0.52DCD=0.5
Velocity(m/s)
1DOF- 1DOFPIV
DCBBD=10
Smooth Flow:
CD=0.52DCD=0.5
Velocity(m/s)
1DOF- 1DOFPIV
Smooth Flow:
1DOF
Pressure(Pa)CD=0.5Ur=80
12
t(s)
DCBBD=10,CD=0.5
Pressure(Pa)Smooth Flow:
1DOFCD=0.5Ur=80
13
1DOF
1DOF
Pressure(Pa)CD=0.5Ur=80
14
t(s)
DCBBD=10,CD=0.5
Smooth Flow:
1DOF
Pressure(Pa)CD=0.5Ur=80
15
1DOF
1DOF
Pressure(Pa)CD=0.5Ur=80
16
DCB
BD=10
CD=0.51DOFUr=80CD=2.0
,
Pressure(Pa)Pressure(Pa)
CD=0.5CD=2.0
CD=0.5
Pressure(Pa)Pressure(Pa)
CD=0.5CD=2.0
Ur=80CD=0.5CD=0.5CD=2.0CD=0.5CD=2.0
D(1DOFUr=80 2000 CCD=2.0CD=0.5
CD=0.5
BD=10-1.01.00.0>
-1DOF
DCBBD=10CD=0.5
Pressure(Pa)
Smooth Flow:
20
CD=0.5Ur=12.5
Pressure(Pa)
-1DOF
21
DCB
Pressure(Pa)
Smooth Flow:
-1DOFBD=10CD=2.0
22
Pressure(Pa)
t(s)
DCD=2.0Ur=12.5CB
CD=2.0Ur=12.5
-1DOF
23
Ur=12.5
CD=0.5CD=2.0CD=2.0CD=0.5Ur=12.5CD=2.0(1DOF) 2001
>
-1DOFCD=2.0CD=0.5
CD=0.5CD=2.0Ur=12.5
SIM
CD=0.5=90CD=0.5=30CD=2.0=90CD=2.0=301DOFUr=80
DC
-1.01.00.0B
SIM 1992
12
Ur=80
CD=0.5CD=2.0:No handrail:=90:=30:No handrail:=90:=30
:CD=0.5=30
SIM
CD=0.5=90CD=0.5=30CD=2.0=90CD=2.0=301DOFUr=80
-1.01.00.0
SIM 1992
12
Ur=80
CD=0.5CD=2.0:No handrail:=90:=30:No handrail:=90:=30
:CD=0.5=30
1DOFCD=0.5=30SIM
2.CFD
1DOFUr=80 CD=0.5CD=2.01DOFUr=12.5
CD=0.5 CD=0.5=30
27
CFD
28
