铁路连锁滴水机的疲劳分析基于其应力,包括位移负荷和波动的风载荷
Like Pan1, Caizhi Yang1, Xinxin Shen2
1Standards & Metrology Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing, China.
Science progress
|February 20, 2025
概括
这项研究模拟了铁路连锁链下降器应力和疲劳寿命在火车负载和风下. 滴水器IV最容易发生故障,疲劳寿命因风力负荷而显著减少.
科学领域:
- 机械工程 机械工程
- 土木工程 土木工程是指土木工程.
- 铁路工程 铁路工程是指铁路工程.
背景情况:
- 铁路连锁系统对于向列车传输电力至关重要.
- 连锁液滴器是易受机械应力和疲劳的关键部件.
- 了解在动态负载下滴水器的性能对于运行安全和维护至关重要.
研究的目的:
- 为了研究铁路连锁连锁滴水器的压力和疲劳寿命.
- 分析 Pantograph 位移负荷和波动的风负荷的影响.
- 开发一个计算模型来预测在操作条件下滴水器的行为.
主要方法:
- 开发了一个简单的链式悬挂连锁车模型.
- 使用 MATLAB 代码,通过有限差异方法解决滴水器的振动方程.
- 最初的边界条件是从电线反应方程中得出的.
主要成果:
- 在 250 公里/小时的列车速度下,滴水器应力表现出三个阶段:即时反弹,减弱振动和曲压缩.
- 滴水器IV在一段时间内表现出最高的故障概率.
- 疲劳寿命被风显著减少;在25m/s,疲劳寿命降低大约三倍的滴水器I-IV与没有风的条件相比.
结论:
- 开发的模型准确地预测了在运行负载下下降器应力和疲劳寿命.
- 风力负荷是一个关键因素,可以显著减少滴水机疲劳寿命.
- 该研究为优化滴水器设计和确保铁路基础设施可靠性提供了宝贵的见解.
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