D19E diesel locomotive dynamics performance during curve negotiation

MAI Vantham1，2, SUN Ji1 , WU Shijing1
(1. School of Power & Mechanical Engineering，Wuhan University，Wuhan 430072，China;
2. University of Transport and Communications, Ha noi 10000, Viet Nam)

Abstract: In order to study the D19E diesel locomotive dynamics performance during curve negotiation, the basic technology of Vietnam railways and D19E diesel locomotive structure were analyzed, and  the D19E locomotive dynamical model was built by Simpack software. The vehicle dynamics performance at the problem of curve negotiation was simulated. According to the vehicle dynamics performance’s evaluation standard of the Vietnam railways, the problem of curve negotiation under the influence of track irregularities and different working conditions was analyzed and estimated. The result of study shows that, when it gets through 100 meter curve radius, the wheel/rail lateral force is very close to allowable limit 52 kN， while it gets through under 300 meter curve radius, the rates of wheel load reduction are very close to the danger limits 0.65 of static wheel load reduction, but all of them are under the danger limit 08 of dynamic wheel load reduction. So the  D19E diesel locomotive dynamics performance has fully addressed the safety requirements of Vietnam railways for curve negotiation.
Key words: D19E locomotive；curve negotiation；vietnam railways；dynamics performance；track irregularity