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Parallel co-simulation method for railway vehicle-track dynamics

This paper introduces a new parallel co-simulation method to study vehicle-track dynamic interactions. The new method uses the transmission control protocol/internet protocol (TCP/IP) to enable co-simulation between a detailed in-house track dynamics simulation package and a commercial vehicle system dynamics simulation package. The exchanged information are wheel-rail contact forces and rail kinematics. Then, the message passing interface (MPI) technique is used to enable the model to process track dynamics simulations and vehicle dynamics simulations in parallel. The parallel co-simulation technique has multiple advantages: (1) access to the advantages of both in-house and commercial simulation packages; (2) new model parts can be easily added in as new parallel processes; and (3) saving of computing time. The original track model used in this paper was significantly improved in terms of computing speed. The improved model is now more than ten times faster than the original model. Two simulations were conducted to model a locomotive negotiating a section of track with and without unsupported sleepers. The results show that the vertical rail deflections, wheel-rail contact forces and vehicle suspension forces are evidently larger when unsupported sleepers are present. The simulations have demonstrated the effectiveness of the proposed parallel co-simulation method for vehicle-track dynamic interaction studies. © 2018 by ASME.

Funding

Category 3 - Industry and Other Research Income

History

Volume

13

Issue

4

Start Page

041004-1

End Page

041004-9

Number of Pages

9

eISSN

1555-1423

ISSN

1555-1415

Publisher

The American Society of Mechanical Engineers

Peer Reviewed

Yes

Open Access

No

Acceptance Date

22/10/2017

Author Research Institute

Centre for Railway Engineering

Era Eligible

Yes

Journal

Journal of Computational and Nonlinear Dynamics