Preview

RUSSIAN RAILWAY SCIENCE JOURNAL

Advanced search

Factors Responsible for Wheel - Rail Interaction in Curves

Abstract

There are discussed curve negotiation related vehicle - track interaction processes. Not only maximum but also averaged values of the interaction indices ought to be taken into consideration while analyzing the respective calculation and test results. They determine to a greater extent the mechanical forces-caused processes governing track and vehicle related energy consumption and wear rate. Also presented are factors influencing the wheel - rail dynamic interaction processes, characteristic of railway car movement within a train consist. With railway track in a good condition values of frame forces are governed not so much by the track curvature as by the total of inertial forces and external loads acting upon the car sprung parts. In-track lateral forces represent the sum of the frame forces acting upon a wheelset and friction forces within a wheel -rail contact. Lateral forces’ values essentially depend not only on the track irregularities, but also on the contact surface friction which value increases in the steep curves. That’s why the force acting from the wheel may significantly outweigh the frame force acting upon the wheelset. And this is the reason for the gauge outward pressure rate to be different in the steep and smooth curves at the within-one-order frame forces’ values. With a wheel attacking the outer rail line the value of the lateral force applied to this wheel is governed not only by the frame force acting on the boxes and the inertia of the respective wheelset, but also by the friction value on the other wheel of the wheelset which is forced contrariwise, thus side-shifting the inner rail and causing additional track spreading. Operational experience witness that in terms of equal unbalanced accelerations’ values track disconsolidation and spreading are greater in the steep rather than in the smooth curves. This indicates the relevance of applying friction modifiers to the inner rails’ running surfaces.

About the Author

Y. S. Romen
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation


References

1. Tyagovo-energeticheskie pokazateli manevrovykh teplovozov s gidroperedachey i puti ikh sovershenstvovaniya. Referativnyy sbornik. Transportnoe oborudovanie [Tractional energy performance of shunting locomotives with hydraulic transmission and ways of improvement. Abstract collection. Transport equipment]. Moscow, NIIInformtyazhmash Publ., 1977. 42 p.

2. Yakovlev G. F. Remont gidravlicheskikh peredach teplovozov [Repair of hydraulic transmission of diesel locomotives]. Moscow, Transport Publ., 1975. 264 p.

3. Laptev Yu. N. Dinamika gidromekhanicheskikh peredach [Dynamics of hydromechanical transmission]. Moscow, Mashinostroenie Publ., 1983. 104 p.

4. Stepchenkov V. T., Sidyachev N. V., Rodionov I. N. Issledovanie rezhimov raboty i otsenka ekspluatatsionnoy ekonomichnosti teplovozov serii TGM3 i TGM6 na metallurgicheskikh predpriyatiyakh [The study of operating modes and the assessment of operational efficiency of diesel locomotives series TGM3 and TGM6 at metallurgical plants]. Trudy VNITI [Proc. All-Russ. Research Locomotive Inst.], 1975, no. 41, pp. 31 – 43.

5. Osipov A. V., Kruchek V. A., Kurilkin D. N. Otsenka kachestva protsessa pereklyucheniya gidrotransformatorov gidroperedachi promyshlennogo lokomotiva [Assessment of the quality of the process of switching torque converters of hydraulic transmission of industrial locomotives]. Izvestiya PGUPS [Proceedings of the Petersburg State Univ. of Railways], 2013, no. 1, pp. 128 – 139.

6. Kochkarev A. Ya. Gidrodinamicheskie peredachi [Hydrodynamic transmission]. Leningrad, Mashinostroenie Publ., 1971. 336 p.

7. Yushko V. I., Mitskevich V. G. O perekhodnykh protsessakh v mnogotsirkulyatsionnykh gidrodinamicheskikh peredachakh teplovozov [On transition processes in multi-circulatory hydrodynamic transmissions of locomotives]. Trudy MIIT [Proc. Moscow Institute of Transportation Engineers], 1967, no. 243, pp. 135 – 141.


Review

For citations:


Romen Y.S. Factors Responsible for Wheel - Rail Interaction in Curves. RUSSIAN RAILWAY SCIENCE JOURNAL. 2015;(1):17-26. (In Russ.)

Views: 717


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


ISSN 2223-9731 (Print)
ISSN 2713-2560 (Online)