Computer-aided analysis of multibody dynamics (part 2)
Multiphysics modelling of railway vehicle equipped with pneumatic suspension Nicolas Docquier (
[email protected])
GraSMech – Multibody
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Contents Railway vehicle description ¾ Classical railway vehicle ¾ Secondary pneumatic suspension Modelling and numerical methods ¾ Multibody ¾ Pneumatic ¾ Co-simulation Application ¾ Delta Q/Q ¾ Curve entry GraSMech – Multibody
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Contents Railway vehicle description ¾ Classical railway vehicle ¾ Secondary pneumatic suspension Modelling and numerical methods ¾ Multibody ¾ Pneumatic ¾ Co-simulation Application ¾ Delta Q/Q ¾ Curve entry GraSMech – Multibody
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Railway vehicles Principle parts ¾ Carbody
¾ Running gear Rigid-frame vehicles
Bogie vehicles
GraSMech – Multibody
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Conventional bogie Main components Bolster Secondary suspension Bogie frame Primary suspension
Axle box
Wheelset
GraSMech – Multibody
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Conventional bogie Main components Bolster Secondary suspension Bogie frame Primary suspension
Wheelset
Anti-roll bar
GraSMech – Multibody
Axle box
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Conventional bogie Main components Bolster
Traction rod
Secondary suspension Bogie frame Primary suspension
Anti-roll bar
Wheelset
GraSMech – Multibody
Axle box
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Variant of the conventional bogie Conventional bogie
–
Jakob’s bogie
Tyred bogie Independant wheels bogie
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Pneumatic circuit Pneumatic bellow
¾ Stiffness: k ≈
Ae2 p0 V0
¾ Effective area: Ae = 0.1 … 0.4 m2 ¾ Volume: V0 = 10 … 40 l ¾ Static load: 50 … 130 kN pressure: p0 = 4 … 8 bar
GraSMech – Multibody
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Pneumatic circuit Auxiliary tank
VR = 20…100 l volume
stiffness k ≈
Ae2 p0 V0 + Vr
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Pneumatic circuit Pipe orifice
pressure drop
pneumatic damping
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Pneumatic circuit Levelling valve
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Pneumatic circuit Levelling valve
load
carbody height air admission GraSMech – Multibody
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Pneumatic circuit Levelling valve
load
carbody height air exhaust GraSMech – Multibody
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Pneumatic circuit Levelling valve
Air flow pb2
