Research on curving safety for six-axle heavy-haul locomotive under coupler compressive force

doi:10.16265/j.cnki.issn1003-3033.2018.S1.009

Abstract

Abstract: To guarantee the curving safety of six-axle heavy-haul locomotive subjected to the coupler compressive force, the dynamic model of HXD locomotive was established based on the theory of multi-body dynamics. In the model, the restoring ability of coupler was considered. Taking the two connected locomotives as research objects, the curving performances in the idling case and that under the coupler compressive force were analyzed. The results show that the dynamic indices can meet the safety requirements as the locomotives run without large coupler forces. Once the 200 ton coupler force is applied in the locomotives negotiating a curved track with 300 m radius, the running safety will be threatened with the coupler free swing angle increasing. If the free swing angle reaches 4°, the wheel set lateral force exceeds the safety limit value and the wheel-load reduction rate is also close to the limit value. The coupler free swing angle should be limited within 3.5°.

Key words: heavy-haul locomotive, coupler, free swing angle, multi-body dynamics, safety limit value

CLC Number:

X924.4

LIU Zhaohui, LIU Pengfei, XUE Kai, FENG Quanbao. Research on curving safety for six-axle heavy-haul locomotive under coupler compressive force[J]. China Safety Science Journal, 2018, 28(S1): 46-52.

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