Railway Dynamics Studies at CITEF with SIMPACK
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CITEF Centro de Investigación en Tecnologías Ferroviarias UPM Universidad Politécnica de Madrid SIMPACK User Meeting 2003 Jenny Paulin [email protected] Berta Suárez [email protected] Railway Dynamics Studies at CITEF with SIMPACK
Transcript of Railway Dynamics Studies at CITEF with SIMPACK
CITEF Centro de Investigación en Tecnologías FerroviariasUPM Universidad Politécnica de Madrid
SIMPACK User Meeting 2003
Jenny [email protected]
Berta Suá[email protected]
Railway Dynamics Studies
at CITEF with SIMPACK
2SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
UPM – Universidad Politécnica de Madrid
ETSII – Escuela Técnica Superior de Ingenieros Industriales
CITEF – Centro de Investigación en Tecnologías Ferroviarias
Introduction to CITEF
Prof. Dr. Carlos Vera (director)
Berta Suárez (project director)
Jenny Paulin (project engineer)
Pablo Rodríguez (project engineer)
SIMPACK modelling group (3 people)
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
C/ José Gutiérrez Abascal, 2; E-28006 Madrid; Tel.: 0034 91 336 32 12
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April 2003
B. Suárez J. Paulin
Projects
Railway dynamics in SIMPACKPantograph models
Catenary models
Coupled model:Coupled model: pantograph pantograph –– catenarycatenary
Rolling stock
Student projects
Future projectsSwitch modelling
Railway track stiffness transition
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
4SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
Aerial conductor rails
Conductor rail – main application in Metro systems– replaces conventional overhead lines in tunnels– 2 materials: aluminium (rail) & copper (contact wire)
Aluminium rail
Copper contact wire
Support
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
5SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
Conductor rail as an elastic body
SIMPACK MODEL: Conductor rail (includes supports)
modelled as an elastic body in a FEM program
supports are included in the FEM model
modes up to 30 Hz are included in FEMBS
tracks with lengths >300 m modelled
Pantograph
Supports that carry the conductor rail every 10 m are modelled in the FEM program and are not shown here.
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
6SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
Pantograph 3-D model
Joints
Head with two contact strips
Head suspension
SIMPACK MODEL: Pantograph
three-dimensional model in SIMPACK
conventional design with two conductor strips
Pantograph base
Upper arm
Lower arm
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
7SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
Pantograph – Technical data
MODELLING of pantograph
3-D CAD-drawings
including real values for:
– mass
– inertia moments
– geometry
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
8SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
Pantograph – Experimental data
Experiment for determiningdamping of head suspension
Damping values were obtained by experiments to estimate
– damping of pantograph’s head suspension– friction loss in the joints
Two types of experiments were conducted
Experiment for determiningfriction loss in joints
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
9SIMPACK User Meeting
April 2003
B. Suárez J. Paulin
Pantograph – Experimental data
Comparison of the results for head suspension damping
0 0.5 1 1.5 2 2.5 3 3.5 4-2
-1
0
1
2
3
4
t [s ]
acel
erac
ion
en g
25exp
100 101 1020
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40
60
80
100
120
140
Trans formada de Fourier
Frecuencia[Hz]
FFT
s impackexp
f = 7 Hzf = 5 Hz
f = 6 Hz
Time domain
Frequency domain
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Pantograph – Additional forces
Cam - chain
Spring
Static force, Fstatic = 100 N
Aerodynamic force, Faero = 10 N (for v>100 km/h)
Faero = 10 N
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Coupled SIMPACK model: CONDUCTOR RAIL & PANTOGRAPH
OBJECTIVES
dynamic behaviour analysis
calculation of contact forces that appear between contact strips and conductor rail (wear)
How do we model the contact between contact strips and conductor rail?
Contact problem
solution 1simple contact model
solution 2complex contact model
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Contact problem 1
Solution 1: Simple contact model
– FE-18 “unilateral sping-damper” used for contact spring
k∆z
Fixed point (marker) on contact strip
Moved point (moved marker) on the conductorrail
Contact spring (works only when contact)
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Contact problem 2
Solution 2: Complex contact model (introducing contact surfaces)
– MM-87 “surface/surface 3-D contact” used for moved points
– FE-18 “unilateral sping-damper” used for contact spring
kdmin ∆d
Moved points on surfaces (moved markers)
Contact wire
Contact strip (pantograph)
Contact spring
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Contact problem 2
Solution 2: Complex contact model (introducing contact surfaces)
How do we move the contact surface along the elastic contact wire?
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Special moved marker
Conductor rail: SPECIAL MOVED MARKER (USER ROUTINE)
MM that moves along the elastic body (contact wire)
MM allows use of several sections
MM can be used in models with several pantographs
MM essential for section overlapping
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Special moved marker
Conductor rail: SPECIAL MOVED MARKER
Example in SIMPACK: Section overlappingIntroduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Calculation - Results
Results: CONTACT FORCE GRAPH & STATISTICS
Red: leading contact strip
Blue: trailing contact strip
Green: total contact force
Total
Mean Force [N] 102.38
Standard Deviation [N] 6.78
Statistical Max. [N] 122.71
Statistical Min. [N] 82.06
Actual Max. [N] 129.68
Actual Min. [N] 83.82
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Calculation - Results
PARAMETRIC VARIATION
Running velocity
Distance between supports
Assessing current collection quality
0
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60
80
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120
140
160
180
Con
tact
For
ce [N
]
Mean Force [N]
Standard Deviation [N]
Statistical Maximum [N]
Statistical Minimum [N]
Actual Maximum [N]
Actual Minimum [N]
Statistics
Running Velocity Variation
10m 90km/h
10m 110km/h
10m 130km/h
12m 110km/h
14m 110km/h
0
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standard deviation, σσσσ
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Elastic pantograph head
Wear on contact strips and contact wire
Modelling a conventional catenary
LOADS (data transfer SIMPACK – FEM)
Future work
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Rolling stock
Example for the model of a detailed motorized bogie
CAD model
SIMPACK model
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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April 2003
B. Suárez J. Paulin
Student projects
Bogie over an elastic bridge
Roller rig
Passive and active steering
Ergonomics of an urban coach
Railway collision: implications onpassengers
Brake system of a freight car
Detailed Model of an urban bogie
Stability, comfort and derailment criteria
Passive and active tilting
Active suspensions
Introduction
Conductor Rail
Pantograph
Coupled Model
Rolling Stock
Student Projects
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B. Suárez J. Paulin
FIN...FIN...
SIMPACK User Meeting 2003
