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Technical Brief

Parallel Computing Scheme for Three-Dimensional Long Train System Dynamics

[+] Author and Article Information
Qing Wu

Centre for Railway Engineering,
Central Queensland University,
Rockhampton QLD 4702, Australia
e-mail: q.wu@cqu.edu.au

Maksym Spiryagin, Colin Cole

Centre for Railway Engineering,
Central Queensland University,
Rockhampton QLD 4702, Australia

1Corresponding author.

Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received July 21, 2016; final manuscript received December 4, 2016; published online January 20, 2017. Assoc. Editor: Jozsef Kovecses.

J. Comput. Nonlinear Dynam 12(4), 044502 (Jan 20, 2017) (7 pages) Paper No: CND-16-1351; doi: 10.1115/1.4035484 History: Received July 21, 2016; Revised December 04, 2016

Simulations of three-dimensional train system dynamics for long freight railway trains with consideration being given to all degrees-of-freedom of all essential components of all vehicles have not been reported due to the challenge of long computing time. This paper developed a parallel computing scheme for three-dimensional train system dynamics. Key modeling techniques were discussed, which include modeling of longitudinal train dynamics, single vehicle system dynamics and multibody coupler systems. Assume that there are n vehicles in the train, then, n + 2 cores are needed. The first core (core 0) is used as the master core; the last core (core n + 1) is used for air brake simulation; the rest of the cores (core 1 to core n) are used for the computing of single vehicle system dynamics for all n vehicles in parallel. During the simulation, the master core collects the results from core n + 1 and then sends the air brake pressures and knuckle forces to core 1 to core n. core 1 to core n execute vehicle system dynamics simulations and then send the coupler kinematics to the master core. The details of the parallel computing scheme were presented in this paper. The feasibility of the computing scheme has been demonstrated by a simulation of a long heavy haul train that has 214 vehicles. A 3 h train trip was simulated; 216 cores were used. The accumulated computing time of all cores was about 253 days, while the wall-clock time was about 29 h. Such computing speed has made the simulations of three-dimensional train system dynamics practical.

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References

Wu, Q. , Cole, C. , Luo, S. , and Spiryagin, M. , 2014, “ A Review of Dynamics Modelling of Friction Draft Gear,” Veh. Syst. Dyn., 52(6), pp. 733–758. [CrossRef]
Cole, C. , 2006, “ Longitudinal Train Dynamics,” Handbook of Railway Vehicle Dynamics, S. Iwnicki , ed., Taylor & Francis, London, pp. 239–278.
Polach, O. , Berg, M. , and Iwnicki, S. , 2006, “ Simulation,” Handbook of Railway Vehicle Dynamics, S. Iwnicki , ed., Taylor & Francis, London, pp. 359–421.
Wu, Q. , Luo, S. , Xu, Z. , and Ma, W. , 2013, “ Coupler Jackknifing and Derailments of Locomotives on Tangent Track,” Veh. Syst. Dyn., 51(11), pp. 1784–1800. [CrossRef]
Xu, Z. , Ma, W. , Wu, Q. , and Luo, S. , 2013, “ Coupler Rotation Behaviour and Its Effect on Heavy Haul Trains,” Veh. Syst. Dyn., 51(12), pp. 1818–1838. [CrossRef]
Chen, D. , 2010, “ Derailment Risk Due to Coupler Jack-Knifing Under Longitudinal Buff Force,” J. Rail Rapid Transit, 224(5), pp. 483–490. [CrossRef]
Wu, Q. , Spiryagin, M. , Cole, C. , and Sun, Y. Q. , 2016, “ Railway Wagon Dynamics Subjected to Wind, In-Train Forces and Track Geometry Defects,” J. Adv. Veh. Eng., 2(2), pp. 75–81.
Wei, L. , Zeng, J. , and Wang, Q. , 2016, “ Investigation of In-Train Stability and Safety Assessment for Railway Vehicles During Braking,” J. Mech. Sci. Technol., 30(4), pp. 1507–1525. [CrossRef]
Cole, C. , McClanachan, M. , Spiryagin, M. , and Sun, Y. Q. , 2012, “ Wagon Instability in Long Trains,” Veh. Syst. Dyn., 50(s1), pp. 303–317. [CrossRef]
McClanachan, M. , Cole, C. , Roach, D. , and Scown, B. , 1999, “ An Investigation of the Effect of Bogie and Wagon Pitch Associated With Longitudinal Train Dynamics,” Veh. Syst. Dyn., 33(s), pp. 374–385.
Sun, Y. Q. , Cole, C. , Dhanasekar, M. , and Thambiratnam, D. P. , 2012, “ Modelling and Analysis of the Crush Zone of A Typical Australian Passenger Train,” Veh. Syst. Dyn., 50(7), pp. 1137–1155. [CrossRef]
Evans, E. , and Berg, M. , 2009, “ Challenges in Simulation of Rail Vehicle Dynamics,” Veh. Syst. Dyn., 47(8), pp. 1023–1048. [CrossRef]
Bosso, N. , Spiryagin, M. , Gugliotta, A. , and Soma, A. , 2013, Mechatronic Modelling of Real-Time Wheel-Rail Contact, Springer-Verlag, Berlin.
Wu, Q. , Cole, C. , Spiryagin, M. , and Sun, Y. Q. , 2014, “ A Review of Dynamics Modelling of Friction Wedge Suspensions,” Veh. Syst. Dyn., 52(11), pp. 1389–1415. [CrossRef]
Piechowiak, T. , 2009, “ Pneumatic Train Brake Simulation Method,” Veh. Syst. Dyn., 47(12), pp. 1473–1492. [CrossRef]
Wu, Q. , Cole, C. , and Spiryagin, M. , 2016, “ Parallel Computing Enables Whole-Trip Train Dynamics Optimizations,” ASME J. Comput. Nonlinear Dyn., 11(4), p. 044503. [CrossRef]
Wu, Q. , Luo, S. , and Cole, C. , 2014, “ Longitudinal Dynamics and Energy Analysis for Heavy Haul Trains,” J. Mod. Transp., 22(3), pp. 127–136. [CrossRef]
Wu, Q. , and Cole, C. , 2015, “ Computing Schemes for Longitudinal Train Dynamics: Sequential, Parallel and Hybrid,” ASME J. Comput. Nonlinear Dyn., 10(6), p. 064502. [CrossRef]
Shabana, A. , Aboubakr, A. , and Ding, L. , 2012, “ Use of the Non-Inertial Coordinates in the Analysis of Train Longitudinal Forces,” ASME J. Comput. Nonlinear Dyn., 7(1), p. 011001. [CrossRef]
Wu, Q. , 2016, “ Optimisations of Draft Gear Designs for Heavy Haul Trains,” Ph.D. thesis, Central Queensland University, Rockhampton, Australia.
Wu, Q. , Spiryagin, M. , and Cole, C. , 2015, “ Advanced Dynamic Modelling for Friction Draft Gears,” Veh. Syst. Dyn., 53(4), pp. 475–492. [CrossRef]
Wu, Q. , Yang, X. , Cole, C. , and Luo, S. , 2016, “ Modelling Polymer Draft Gear,” Veh. Syst. Dyn., 54(9), pp. 1208–1225. [CrossRef]
Wu, Q. , Spiryagin, M. , and Cole, C. , 2016, “ Longitudinal Train Dynamics: An Overview,” Veh. Syst. Dyn., 54(12), pp. 1688–1714. [CrossRef]
Nasr, A. , and Mohammadi, S. , 2010, “ The Effects of Train Brake Delay Time On In-Train Forces,” J. Rail Rapid Transit, 224(6), pp. 523–534. [CrossRef]
Specchia, S. , Afshari, A. , Shabana, A. , and Caldwell, N. , 2013, “ A Train Air Brake Force Model: Locomotive Automatic Brake Valve and Brake Pipe Flow Formulations,” J. Rail Rapid Transit, 227(1), pp. 19–37. [CrossRef]
Cantone, L. , 2011, “ TrainDy: The New Union Internationale Des Chemins de Fer Software for Freight Train Interoperability,” J. Rail Rapid Transit, 225(1), pp. 57–70.
Belforte, P. , Cheli, F. , Diana, G. , and Melzi, S. , 2008, “ Numerical and Experimental Approach for the Evaluation of Severe Longitudinal Dynamics of Heavy Freight Trains,” Veh. Syst. Dyn., 46(s1), pp. 937–955. [CrossRef]
Spiryagin, M. , Cole, C. , Sun, Y. , McClanachan, M. , Spiryagin, V. , and McSweeney, T. , 2014, Design and Simulation of Rail Vehicles, CRC Press, Boca Raton, FL.
Spiryagin, M. , Wolfs, P. , Cole, C. , Spiryagin, V. , Sun, Y. Q. , and McSweeney, T. , 2016, Design and Simulation of Heavy Haul Locomotives and Trains, CRC Press, Boca Raton, FL.
Bruni, S. , Vinolas, J. , Berg, M. , Polach, O. , and Stichel, S. , 2011, “ Modelling of Suspension Components in a Rail Vehicle Dynamics Context,” Veh. Syst. Dyn., 49(7), pp. 1021–1072. [CrossRef]
Spiryagin, M. , Wu, Q. , Duan, K. , Cole, C. , Sun, Y. , and Persson, I. , 2016, “ Implementation of A Wheel–Rail Temperature Model for Locomotive Traction Studies,” Int. J. Rail Transp., 5(1), pp. 1–15. [CrossRef]
Spiryagin, M. , Polach, O. , and Cole, C. , 2013, “ Creep Force Modelling for Rail Traction Vehicles Based on the Fastsim Algorithm,” Veh. Syst. Dyn., 51(11), pp. 1765–1783. [CrossRef]
Sugiyama, H. , and Suda, Y. , 2009, “ On the Contact Search Algorithms for Wheel/Rail Contact Problems,” ASME J. Comput. Nonlinear Dyn., 4(4), p. 041001. [CrossRef]
Yamashita, S. , and Sugiyama, H. , 2012, “ Numerical Procedure for Dynamic Simulation of Two-Point Wheel/Rail Contact and Flange Climb Derailment of Railroad Vehicles,” ASME J. Comput. Nonlinear Dyn., 7(4), p. 041012. [CrossRef]
Recuero, A. M. , and Shabana, A. A. , 2014, “ A Simple Procedure for the Solution of Three-Dimensional Wheel/Rail Conformal Contact Problem,” ASME J. Comput. Nonlinear Dyn., 9(3), p. 034501. [CrossRef]
Wu, Q. , Sun, Y. , Spiryagin, M. , and Cole, C. , 2016, “ Methodology to Optimize Wedge Suspensions of Three-Piece Bogies of Rail Vehicle,” J. Vib. Control (online).
Spiryagin, M. , Wolfs, P. , Szanto, F. , and Cole, C. , 2015, “ Simplified and Advanced Modelling of Traction Control System of Heavy-Haul Locomotives,” Veh. Syst. Dyn., 53(5), pp. 672–691. [CrossRef]
Negrut, D. , Serban, R. , Mazhar, H. , and Heyn, T. , 2014, “ Parallel Computing in Multibody System Dynamics: Why, When and How,” ASME J. Comput. Nonlinear Dyn., 9(4), p. 041007. [CrossRef]
Sugiyama, H. , Yamashita, S. , and Suda, Y. , 2010, “ Curving Simulation of Ultralow-Floor Light Rail Vehicles With Independently Rotating Wheelsets,” ASME Paper No. IMECE2010-37286.
Eberhard, P. , Dignath, F. , and Kubler, L. , 2003, “ Parallel Evolutionary Optimization of Multibody Systems With Application to Railway Dynamics,” Multibody Syst. Dyn., 9(2), pp. 143–164. [CrossRef]
Central Queensland University, 2015, “ High Performance Computing,” Central Queensland University, Rockhampton, Queensland, Australia, accessed July 20, 2016, https://www.cqu.edu.au/hpc

Figures

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Fig. 5

Wheel/rail contact model [31]: (a) contact points and patch dimensions and (b) tangential force determination

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Fig. 4

Parallel computing scheme

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Fig. 3

Draft gear structures of (a) a friction draft gear and (b) a polymer draft gear [20]

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Fig. 2

Key modeling techniques

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Fig. 1

Multibody coupler system model [4]: (a) coupler system and (b) knuckle connection

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Fig. 6

Simulation information: (a) track data and (b) train driving controls and train speed

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Fig. 7

Simulation results: (a) draft gear forces, (b) coupler angles and (c) lateral forces on wheels

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