the interactions between railway vehicle...
TRANSCRIPT
Institute of Railway Research
The Interactions Between
Railway Vehicle Dynamics And
Track Lateral Alignment
Cencen Gong
Institute of Railway Research (IRR) University of Huddersfield
Supervisor: Prof. Simon Iwnicki, Dr. Yann Bezin
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Institute of Railway Research
Contents
• Research background & reason 1
• Vehicle-track interaction model 2
• Influence of different ballast conditions 3
• Influence of various vehicles on degradation 4
• Conclusion & further work 5
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Research background
Institute of Railway Research
Contents
• Research background & reason 1
• Vehicle-track interaction model 2
• Influence of different ballast conditions 3
• Influence of various vehicles on degradation 4
• Conclusion & further work 5
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Research background
Institute of Railway Research
Background
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HIGHER SPEED
HIGHER CAPACITY
Research background
Institute of Railway Research
Previous Track Settlement Studies
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Research background
Institute of Railway Research
Contents
• Research background & reason 1
• Vehicle-track interaction model 2
• Influence of different ballast conditions 3
• Influence of various vehicles on degradation 4
• Conclusion & further work 5
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Research background
Institute of Railway Research
Model development
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Model Development
Vehicle dynamic model
Lateral Track Deterioration
model
Institute of Railway Research
Track Model Development
8 8
Number of sleepers: ns Number of nodes between two sleepers: nod Total number of DOF: [(ns-1)*(nod-1)+1]*4+ns*2
Model Development
Institute of Railway Research
Sleeper-ballast Interface
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Resistance provided at sleeper crib
Resistance provided at sleeper base
Model Development
Institute of Railway Research
Model establishment
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Displacement
Force
Time
Force
Model Development
Institute of Railway Research
Overall Model Scheme
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Model Development
Institute of Railway Research
Validation
• Selection of track data (time history)
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0
0.5
1
1.5
2
2.5
0.00 200.00 400.00 600.00 800.00 1000.00
SD v
alu
es
[mm
]
Estimated time [days]
S1
S2
S3
S4
S5
S6
S7
S8
S15
Institute of Railway Research
Validation
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Validation
Section 1
Section 2 Section 3
Correlation coefficient around 0.6-0.8
Institute of Railway Research
Contents
• Research background & reason 1
• Vehicle-track interaction model 2
• Influence of different ballast conditions 3
• Influence of various vehicles on degradation 4
• Conclusion & further work 5
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Research background
Institute of Railway Research
Effect of different ballast conditions
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Effect of different ballast conditions
-20%
-15%
-10%
-5%
+5%
+10%
+15%
+20
krz kry ksz ksy crz cry csz csy
RMS of total residual deflection
Changing stiffness
Average change per unit increase of stiffness value
Changing stiffness
RMS of total residual deflection
Changing damping
Average change per unit increase of damping value
Changing damping
Institute of Railway Research
Contents
• Research background & reason 1
• Vehicle-track interaction model 2
• Influence of different ballast conditions 3
• Influence of various vehicles on degradation 4
• Conclusion & further work 5
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Research background
Institute of Railway Research
Effect of different vehicles
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Veh.1: Class390
Veh.2: Class221
Veh.3: Mark3
Veh.4: 4-Axle freight
laden
Veh.5: 4-Axle freight
laden
Veh.6: 2-Axle freight
laden
Veh.7: 2-Axle freight
laden
Effect of different vehicles
Institute of Railway Research
Contents
• Research background & reason 1
• Vehicle-track interaction model 2
• Influence by different ballast conditions 3
• Influence of various vehicles on degradation 4
• Conclusion & further work 5
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Research background
Institute of Railway Research
Conclusion
• A novel vehicle-track lateral dynamic interaction model has been established to simulate the link between dynamic behaviour of railway vehicles and track lateral alignment, and the model has been validated against recorded track data.
• The residual deflections decrease with an increase of all stiffness values, and the sleeper-ballast lateral stiffness has the biggest impact on the lateral track deterioration. The lateral stiffness values generally have a bigger impact on the lateral track deterioration than the vertical stiffness values.
• Track deterioration decreases as damping values increase, and the sleeper-ballast damping in the lateral direction is found to have the biggest influence.
• Additionally the influence of various vehicles has been investigated
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Conclusion
Institute of Railway Research
Further Work
• Include longitudinal dynamics into the model.
• Include temperature influence.
• More track bed layers – ballast, sub-ballast and subgrade
• Include larger range of representative contact profiles.
• Can be transpose to vertical track settlement
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Institute of Railway Research
References
• [1] I. Makoto, "Track Technology Measurements of TRack Settlement and Its Prediction with Track Dynamic Model," RTRI (Rail Technical Research Institute), vol. 16, pp. 41-46, 2002.
• [2] T. Dahlberg, "Some railroad settlement models—a critical review," Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, vol. 215, p. 289, 2001.
• [3] A. Prud'homme, "Resistance of The Track to Lateral Loads Exerted by Rolling Stock," Trvue Generale des Chemins de Fer, 1967.
• [4] G. A. Hunt and Z. M. Yu, "Measurement of Lateral Resistance Characteristics for Ballasted Track BR Research Report BR-TCE-81," 1997.
• [5] Reinicke, Herrmann, and Parmentier, "Lateral Resistance Tests," DB1997. • [6] J. van't Zand and J. Moraal, "Ballast Resistance under Three Dimensional Loading," TU Delft1996. • [7] H. Olsson, K. J. Åström, C. Canudas de Wit, M. Gäfvert, and P. Lischinsky, "Friction models and friction
compensation," European journal of control, vol. 4, pp. 176-195, 1998. • [8] Corus, Rail Products: Technical Handbook: Corus, 2005. • [9] Railtrack Line Specification, "Track Construction Standards," vol. RT/CE/S/006, ed, 2002. • [10] Y. Bezin, "An Integrated Flexible Track System Model for Railway Vehicle Dynamics," PhD, Department of
Engineering & Technology, Manchester Metropolitan Universtiy, Manchester, 2008. • [11] D. M. Clark, M. McCann, and M. C. Forde, "Infrared Thromographic Investigation of Railway Track Ballast,"
NDT&E international, vol. 35, pp. 83-94, 2002. • [12] A. Kish, G. Samavedam, and D. Wormley, "New Track Shift Safety Limits For High-speed Rail Application,"
in World Congress on Railway Research, Germany, 2001. • [13] P. Shackleton and J. Stow, "Controlling rail vertical contact stresses," presented at the Vehicle Track
Interaction, UK, 2011. • [14] M. Burstow and M. Ryan, "VTISM: Integration of RCF modelling with T-SPA," DeltaRail, Derby2007.
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