Volume 21 Issue 5
Nov.  2021
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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2021  >  21(5): 138-148
GUO Feng, WU Sheng-chuan, FENG Yang, LIU Jian-xin, LIANG Shu-lin, YIN Zhen-kun. Structural design and strength analysis method for inner journal high-speed railway axles[J]. Journal of Traffic and Transportation Engineering, 2021, 21(5): 138-148. doi: 10.19818/j.cnki.1671-1637.2021.05.012
Citation: GUO Feng, WU Sheng-chuan, FENG Yang, LIU Jian-xin, LIANG Shu-lin, YIN Zhen-kun. Structural design and strength analysis method for inner journal high-speed railway axles[J]. Journal of Traffic and Transportation Engineering, 2021, 21(5): 138-148. doi: 10.19818/j.cnki.1671-1637.2021.05.012
shu

Structural design and strength analysis method for inner journal high-speed railway axles

doi: 10.19818/j.cnki.1671-1637.2021.05.012
  • 1.

    State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • 2.

    National Engineering Research Center of Railway Vehicles, CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062, Jilin, China

Funds:

National Natural Science Foundation of China 52072321

Project of Science and Technology Research and Development Plan of China Railway P2018J003

Open Project of State Key Laboratory of Traction Power 2019TPL-Q05

Open Project of State Key Laboratory of Traction Power 2021TPL-T04

Open Project of State Key Laboratory of Traction Power 2021TPL-T06

More Information
  • Author Bio:

    GUO Feng(1988-), male, doctoral student, gfnz9@163.com

    WU Sheng-chuan(1979-), male, professor, PhD, wusc@swjtu.edu.cn

    LIU Jian-xin(1965-), male, professor, PhD, jxliu@swjtu.edu.cn

  • Received Date: 2021-03-29
    Available Online: 2021-11-13
  • Publish Date: 2021-10-01
    Abstract
  • To achieve the lightweight design of high-speed trains, the unique inner supporting structures and load-bearing characteristics of inner journal high-speed railway axles were analyzed, and a theoretical model to study both the load-bearing status and structural strength was established for the inner journal high-speed railway axle. An analytical calculation method was proposed to calculate the design limit load and fatigue strength for the inner journal high-speed railway axle. Based on the presented methods, theoretical analysis, finite element method, and vehicle system dynamics, a structural design method was developed for inner journal high-speed railway axles. Further, an inner journal high-speed railway axle with a 17-t axle load was used as a case study to carry out the application research. The critical safety section and detailed dimension scheme of the axle were determined using the theoretical load-bearing analysis results of the inner journal high-speed railway axle. A finite element model for the inner journal high-speed railway axle was established, and the fatigue strength of the axle was evaluated and verified. A rigid-flexible coupled system dynamics simulation analysis model for the high-speed electric multiple unit (EMU) with inner journal axles was constructed. The dynamics properties of the vehicle and the dynamic loads of the axle were obtained and verified. Analysis results reveal that the weight of newly developed inner journal high-speed railway axle with a 17-t axle load is 273.6 kg, about 30% less than that of the traditional outer journal high-speed railway axle. The safety factor of fatigue strength for each section of inner journal high-speed railway axle is larger than 1.66. The critical safety sections are transferred to the bottom of relief groove between the journal and the wheel seat as well as to the arc-shaped transition zone between the journal and the axle body. The high-speed EMU with inner journal axles can stably pass through a curved route with a radius of 5.5 km at a speed of 350 km·h-1, and its main dynamics property indices are excellent. The dynamic loads borne by the axles under the selected curve passing conditions fall within the design limit loads. Therefore, it is robust enough to carry out the structural design and strength analysis for the axles. Thus, the inner journal high-speed railway axle shows significant technical advantages in achieving the lightweight design of high-speed trains with excellent high-speed adaptability. It has immense development and application potential in the field of high-speed trains. 2 tabs, 10 figs, 32 refs.

     

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