Scholarlink

<p>Based on the structure of the existing metro bogie, the structural design of the internal suspension bogie is completed, and the structure and performance characteristics of the internal suspension bogie are expounded. Based on the theory of vehicle system dynamics, a multibody dynamic model is established for both internal suspension bogies and traditional bogies. The effects of the two suspension methods on the stability of vehicle operation, wheelset angle-of-attack, lateral wheel–rail force, derailment coefficient, and wheel load reduction rate are compared in detail. Furthermore, by incorporating measured track curvature data and track load spectra, the dynamic stress history of the bogie frame was obtained through co-simulation using multibody dynamics and finite element method. The frame stress spectrum was developed based on rainflow-counting technique and extrapolated to the full-life cycle, and the fatigue life of the frame was evaluated using linear and nonlinear cumulative damage theories. The results indicate that the vehicle multibody dynamics model based on substructure can effectively reflect the dynamic characteristics of the frame, and the model has been validated through line test to have high prediction accuracy. On the premise of meeting the dynamic standards, some dynamic parameters of the internal suspension bogie are superior to traditional bogies, such as the wheelset angle-of-attack, lateral wheel–rail force, derailment coefficient, and wheel load reduction rate. The fatigue damage of the frame calculated based on linear and nonlinear models has a good consistency, and the fatigue life of all measuring points meets the design requirements and is consistent with the safety margin guaranteed by the designer. The fatigue life of the structure calculated by the nonlinear model is greater than that of the linear model, indicating that the nonlinear cumulative damage assessment method can fully utilize the safety margin. The research results provide theoretical reference for the structure and anti-fatigue design of new bogies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The operational performance and fatigue life analysis of internal suspension bogie

  • 期刊论文

  • 发表日期：

    2025年10月3日

查看全文
  • Qian Xiao,
  • Mingkang Zhang,
  • Daoyun Chen,
  • Xilin Wang,
  • Cheng Lei

摘要

Based on the structure of the existing metro bogie, the structural design of the internal suspension bogie is completed, and the structure and performance characteristics of the internal suspension bogie are expounded. Based on the theory of vehicle system dynamics, a multibody dynamic model is established for both internal suspension bogies and traditional bogies. The effects of the two suspension methods on the stability of vehicle operation, wheelset angle-of-attack, lateral wheel–rail force, derailment coefficient, and wheel load reduction rate are compared in detail. Furthermore, by incorporating measured track curvature data and track load spectra, the dynamic stress history of the bogie frame was obtained through co-simulation using multibody dynamics and finite element method. The frame stress spectrum was developed based on rainflow-counting technique and extrapolated to the full-life cycle, and the fatigue life of the frame was evaluated using linear and nonlinear cumulative damage theories. The results indicate that the vehicle multibody dynamics model based on substructure can effectively reflect the dynamic characteristics of the frame, and the model has been validated through line test to have high prediction accuracy. On the premise of meeting the dynamic standards, some dynamic parameters of the internal suspension bogie are superior to traditional bogies, such as the wheelset angle-of-attack, lateral wheel–rail force, derailment coefficient, and wheel load reduction rate. The fatigue damage of the frame calculated based on linear and nonlinear models has a good consistency, and the fatigue life of all measuring points meets the design requirements and is consistent with the safety margin guaranteed by the designer. The fatigue life of the structure calculated by the nonlinear model is greater than that of the linear model, indicating that the nonlinear cumulative damage assessment method can fully utilize the safety margin. The research results provide theoretical reference for the structure and anti-fatigue design of new bogies.