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Fatigue life prediction for locomotive bogie frames using virtual prototype technique
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit ( IF 1.7 ) Pub Date : 2021-01-12 , DOI: 10.1177/0954409720986667
Ruixian Xiu 1, 2 , Maksym Spiryagin 2 , Qing Wu 2 , Shuchen Yang 1 , Yanwen Liu 3
Affiliation  

Current research papers use simulated load spectrums to assess bogie frames’ fatigue life but seldom consider traction and braking loads. Traction and braking loads play important roles in predicting fatigue life in high-speed and heavy haul operational scenarios. Hence, there is a research gap in terms of the consideration of longitudinal load spectrums while assessing bogie frames’ fatigue life. This paper presents research about this topic. A virtual prototype technique available in literature has been extended for this purpose; it uses multibody dynamics and finite element techniques to simulate the behaviour of bogie frames under real operational service loads. As a result, the special simulation methodology has been developed in this work and it includes the unique integration of simulation approaches that includes train dynamics, locomotive dynamics with the consideration of a traction control algorithm and the adopted fatigue life calculation method. This paper gives numerical examples of a rigid-flexible coupled dynamic railway vehicle model subjected to longitudinal forces. Road Environment Percent Occurrence Spectrum (REPOS) load spectrums of the bogie frame were developed from a whole-trip train simulation on a real route. The spectrums are then used to predict locomotive the bogie frame’s fatigue life. The results of the bogie frame fatigue life evaluation performed in this paper show that fatigue lives at the roots of traction rod seats under longitudinal load spectrums are shorter than their fatigue life under vertical load spectrums.



中文翻译:

基于虚拟样机技术的机车转向架构架疲劳寿命预测

当前的研究论文使用模拟的载荷谱来评估转向架车架的疲劳寿命,但很少考虑牵引和制动载荷。牵引和制动负载在预测高速和重载作业场景下的疲劳寿命中起着重要作用。因此,在评估转向架框架的疲劳寿命时,在考虑纵向载荷谱方面存在研究空白。本文介绍了有关此主题的研究。为此目的,已经扩展了文献中可用的虚拟原型技术。它使用多体动力学和有限元技术来模拟转向架框架在实际运行服务负载下的行为。结果,在这项工作中开发了特殊的仿真方法,它包括仿真方法的独特集成,其中包括列车动力学,考虑牵引力控制算法和采用的疲劳寿命计算方法的机车动力学。本文给出了承受纵向力的刚柔耦合动力铁路车辆模型的数值示例。转向架车架的道路环境发生率谱(REPOS)载荷谱是根据真实路线上的全程火车模拟得出的。然后,这些频谱用于预测机车转向架框架的疲劳寿命。本文进行的转向架框架疲劳寿命评估结果表明,在纵向载荷谱下,牵引杆座椅根部的疲劳寿命短于在垂直载荷谱下的疲劳寿命。本文给出了承受纵向力的刚柔耦合动力铁路车辆模型的数值示例。转向架车架的道路环境发生率谱(REPOS)载荷谱是根据真实路线上的全程火车模拟得出的。然后,这些频谱用于预测机车转向架框架的疲劳寿命。本文进行的转向架框架疲劳寿命评估结果表明,在纵向载荷谱下,牵引杆座椅根部的疲劳寿命短于在垂直载荷谱下的疲劳寿命。本文给出了承受纵向力的刚柔耦合动力铁路车辆模型的数值示例。转向架车架的道路环境发生率谱(REPOS)载荷谱是根据真实路线上的全程火车模拟得出的。然后,这些频谱用于预测机车转向架框架的疲劳寿命。本文进行的转向架框架疲劳寿命评估结果表明,在纵向载荷谱下,牵引杆座椅根部的疲劳寿命短于在垂直载荷谱下的疲劳寿命。转向架车架的道路环境发生率谱(REPOS)载荷谱是根据真实路线上的全程火车模拟得出的。然后,这些频谱用于预测机车转向架框架的疲劳寿命。本文进行的转向架框架疲劳寿命评估结果表明,在纵向载荷谱下,牵引杆座椅根部的疲劳寿命短于在垂直载荷谱下的疲劳寿命。转向架车架的道路环境发生率谱(REPOS)载荷谱是根据真实路线上的全程火车模拟得出的。然后,这些频谱用于预测机车转向架框架的疲劳寿命。本文进行的转向架框架疲劳寿命评估结果表明,在纵向载荷谱下,牵引杆座椅根部的疲劳寿命短于在垂直载荷谱下的疲劳寿命。

更新日期:2021-01-13
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