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research-article

Parallel co-simulation method for railway vehicle-track dynamics

[+] Author and Article Information
Qing Wu

Centre for Railway Engineering, Central Queensland University, Rockhampton, Australia; Australasian Centre for Rail Innovation, Canberra, Australia
q.wu@cqu.edu.au

Yan Sun

Centre for Railway Engineering, Central Queensland University, Rockhampton, Australia; Australasian Centre for Rail Innovation, Canberra, Australia
y.q.sun@cqu.edu.au

Maksym Spiryagin

Centre for Railway Engineering, Central Queensland University, Rockhampton, Australia; Australasian Centre for Rail Innovation, Canberra, Australia
m.spiryagin@cqu.edu.au

Colin Cole

Centre for Railway Engineering, Central Queensland University, Rockhampton, Australia; Australasian Centre for Rail Innovation, Canberra, Australia
c.cole@cqu.edu.au

1Corresponding author.

ASME doi:10.1115/1.4039310 History: Received October 22, 2017; Revised January 29, 2018

Abstract

This paper introduces a new parallel co-simulation method to study vehicle-track dynamic interactions. The new method uses the TCP/IP protocol 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 10 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 deflection, 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.

Copyright (c) 2018 by ASME
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