DYNAMIC PERFORMANCE INFLUENCES ON HOPF BIFURCATION CHARACTERISTICS FOR VEHICLES

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering , Engineering, Electrical & Electronic

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VOLUME 8 , ISSUE 3 (September 2015) > List of articles

DYNAMIC PERFORMANCE INFLUENCES ON HOPF BIFURCATION CHARACTERISTICS FOR VEHICLES

Haiyan Zhu * / Pingbo Wu * / Jing Zeng * / Guoyao Mai *

Keywords : Hopf bifurcation characteristics, tread, stability and comfort, wheel-rail matching, dynamic performan

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 8, Issue 3, Pages 1,786-1,805, DOI: https://doi.org/10.21307/ijssis-2017-830

License : (CC BY-NC-ND 4.0)

Received Date : 14-April-2015 / Accepted: 12-July-2015 / Published Online: 01-September-2015

ARTICLE

ABSTRACT

This study compares the performance influences for four kinds of tread contour features commonly used in High-Speed trains. The Hopf bifurcation characteristic influencing the dynamic performance for VEHICLE 1 and VEHICLE 2 were analyzed using mathematical matrices models. SIMPACK software was used to create two dynamic models for VEHICLE 1 and VEHICLE 2 for high speed trains equipped with four kinds of treads matched with Chinese 60 rail. Dynamic performance indices for these models were studied during operation in straight track conditions with imposed high interference German track irregularity spectra with the premise of dynamic performance normalized indices processing. The study shows that: VEHICLE 1 exhibits a subcritical bifurcation characteristic under different wheel-rail matching conditions. VEHICLE 2 dynamic performance index values do not increase as speed increases, but wear index gradually increased with increased speed. Vehicles with different structural parameters, wheel-rail matching greatly influences bifurcation stability, comfort and wheel-rail wear. This method indicates an important reference value for wheel-rail matching in high-speed trains and structural parameters of stability and safety for these vehicle systems.

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REFERENCES

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