Russian Federation
Russian Federation
Russian Federation
Objective: to determine the possibility of improving the braking characteristics of electric trains by improving the clamping mechanisms of braking devices. Methods: comparison of the braking distance of electric train wagons moving downhill along a curved section equipped with brake devices with serial and improved pincer mechanisms. The braking characteristics were calculated using simulation modeling created in the RecurDyne application software package. The influence of angular movements of the brake pads on the brake characteristics of electric train cars was evaluated. Results: when braking on a curved section, local areas of contact pads in “pad — disc” pairs were identified. It has been established that angular and linear movements of trolleys caused by the redistribution of masses in the “wagon — cart — wheelset” systems and the inertial load of the wagon affect the local contact in the “shoe — wheel” pairs. It was found that when driving downhill on a curved section, the roll of the wheelsets leads to the formation of gaps between the surfaces of the shoe and the disc from one of the edges of the shoe. To increase the contact area in the braking devices and compensate for the redistribution of masses between the trolleys during braking, the design of the pincer mechanism has been improved, which ensures the tilt of the shoe axes. The braking distance of the electric train carriage was reduced by 43.3 % when using the improved design of the clamping mechanism of the braking device. Practical importance: the necessity of clarifying the methodology for evaluating the braking properties of electric trains when driving on curved sections of track is shown. Its adjustment will improve the safety of passenger electric trains. The proposed improvement of the brake device will reduce the local wear of the pads, which will increase the brake efficiency and the performance of the brake device as a whole.
electric train, braking device, curved section of track, improved pincer mechanism, braking distance
1. Shalupin P. I. Sovershenstvovanie diagnosticheskogo obespecheniya beskontaktnogo teplovogo kontrolya kolodochnyh tormozov gruzovogo podvizhnogo sostava na osnove imitacionnogo modelirovaniya: avtoref. dis. ... kand. tehn. nauk: 05.22.07 / Ural'skiy gosudarstvennyy universitet putey soobscheniya. Ekaterinburg, 2021. 20 s.
2. Research On Wheel/Rail Contact Surface Temperature and Damage Characteristics During Sliding Contact of a Wheel / Y. Wei [et al.] // Journal of Engineering and Applied Science. 2024. No. 71. 201 p. URL: https://doi.org/10.1186/s44147-024-00540-5
3. Deressa K. T., Ambie D. A. Thermal Load Simulations in Railway Disc Brake: A Systematic Review of Modelling Temperature, Stress and Fatigue // Archives of Computational Methods in Engineering. 2022. No. 29. Pp. 2271–2283. URL: https://doi. org/10.1007/s11831-021-09662-y
4. Mandeep S. W. Mechanical Braking Systems for Trains. A Study of Temperatures, Fatigue and Wear by Experiments and Simulations. Thesis For the Degree of Doctor of Philosophy in Solid and Structural Mechanics. 2019. 31 p.
5. Diskovyy tormoz transportnogo sredstva podvizhnogo sostava zheleznyh dorog: patent na izobretenie, RU 2390449 C2; zayavka № 2008100648/11; opubl. 27.05.2010.
6. Lorang X., Chiello O. Stability and Transient Analysis in the Modelling of Railway Disc Brake Squeal // Noise and Vibration Mitigation for Rail Transportation Systems / B. Schulte-Werning [et al.] // Notes on Numerical Fluid Mechanics and Multidisciplinary Design. 2008. Vol 99. Springer, Berlin, Heidelberg. URL: https://doi.org/10.1007/978- 3-540-74893-9_63
7. Simulation and Optimization of Train Brake Disc Based on Coupling Characteristics of FEM and Thermal Flow Density Method / G. Qi [et al.] // Scientific Reports. 2025. No. 15. R. 40617. URL: https://doi.org/10.1038/ s41598-025-24247-6
8. Assessment of the curving performance of heavy haul trains under braking conditions / L. Yang [et al.] // Journalof Modern Transport. 2015. Vol. 23. Pp. 169–175. URL: https://doi.org/10.1007/s40534- 015-0075-1
9. Friction-Induced Stick-Slip Vibration Behavior in High-Speed Train Friction Brake with Triangularly Supported Blocks / G. Liu [et al.] // Nonlinear Dynamics. 2025. Vol. 113. Pp. 21013–21050. URL: https://doi. org/10.1007/s11071-025-11298-7
