- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LIU Pengfei, LIU Hongjun, GAO Hao, REN Zunsong, ZHANG Kailong. Elastic Vibration of Wheelset and Its Dynamic Effect on Railway Heavy-Haul Freight Wagon[J]. Journal of Southwest Jiaotong University, 2022, 57(1): 90-98, 234. doi: 10.3969/j.issn.0258-2724.20210024
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To study the characteristics of wheelset elastic vibration and their effect on the dynamic performance of heavy-haul freight wagon, a railway wagon with a 30 t axle load is considered as the research object in this work. The running stability and the curving performance of vehicle are investigated in a comparative manner. First, the mathematical modeling method of elastic body based on multi-body dynamics is presented. Then, a finite element model of wheelset’s flexible body is established, and the elastic vibration modes are analyzed. The flexible wheelset is integrated in to the multi-rigid-body system, which then forms the rigid-flexible coupling dynamic model of heavy-haul wagon. Finally, for the multi-rigid body and rigid-flexible coupling modeling methods used for the wagon, the differences in wheelset vibration responses, running stability, and curving performance characteristics determined by these methods for a heavy-haul wagon were compared when using the main-line track irregularity with short-wave irregularity as the excitation source. The research results indicate that the deformation of elastic wheelset can alleviate the wheel-rail impact and also weaken the wheel-rail rigid restraining effect when compared with rigid wheelset. Therefore, the vibration amplitude for the flexible wheelset is reduced and the vehicle’s nonlinear critical speed is decreases by 9%. In sharp curves, the wheel-rail lateral force of flexible wheelset is reduced by 13.7%. The influence of wheelset’s elastic vibration on the dynamic performance of the heavy-haul wagon thus can not be ignored.
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