The Interactions Between Railway Vehicle …railway-science-workshops.org/IMG/pdf/39._gong_-_the...Institute of Railway Research The Interactions Between Railway Vehicle Dynamics And

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

1


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

2

Research background


Contents






3

Research background


Background

4

HIGHER SPEED

HIGHER CAPACITY

Research background


Previous Track Settlement Studies

5

Research background


Contents






6

Research background


Model development

7

Model Development

Vehicle dynamic model

Lateral Track Deterioration

model


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


Sleeper-ballast Interface

9

Resistance provided at sleeper crib

Resistance provided at sleeper base

Model Development


Model establishment

10

Displacement

Force

Time

Force

Model Development


Overall Model Scheme

11

Model Development


Validation

• Selection of track data (time history)

12

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


Validation

13

Validation

Section 1

Section 2 Section 3

Correlation coefficient around 0.6-0.8


Contents






14

Research background


Effect of different ballast conditions

15

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


Contents






16

Research background


Effect of different vehicles

17

Veh.1: Class390

Veh.2: Class221

Veh.3: Mark3

Veh.4: 4-Axle freight

laden


laden


laden


laden

Effect of different vehicles


Contents



• Influence by different ballast conditions 3



18

Research background


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


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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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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The Interactions Between Railway Vehicle …railway-science-workshops.org/IMG/pdf/39._gong_-_the...Institute of Railway Research The Interactions Between Railway Vehicle Dynamics And