新型城市轨道交通车辆切削式防爬器研究
陈佳明朱涛肖守讷阳光武杨冰
Research on New Cutting-type Anti-climbers for Urban Rail Transit Vehicles
CHEN JiamingZHU TaoXIAO ShouneYANG GuangwuYANG Bing
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作者信息:西南交通大学牵引动力国家重点实验室, 610031， 成都
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Affiliation:State Key Laboratory of Traction Power, Southwest Jiaotong University, 610031, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.01.022
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中图分类号/CLCN:U270.38+9
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栏目/Col:研究报告
摘要:
［目的］当前，切削式防爬器存在切削初始峰值力过高问题，会出现刀具脱落或断裂，造成防爬器失效的情况。而且，既有双切削式防爬器极易出现内部切屑在管内堆积的情况。因此需对新型城市轨道交通车辆切削式防爬器进行研究。［方法］先建立切削式防爬器的有限元模型，通过将切削式防爬器的切削力、碰撞吸能仿真结果同相关文献的试验结果对比，验证有限元模型模拟方法的准确性。介绍蜂窝切削复合式防爬器和改进的内外双切削式防爬器的工作原理，并通过有限元模型的模拟计算，分析两种新型切削式防爬器的切削性能。［结果及结论］在切削式防爬器出现初始峰值力的位置设置诱导槽，可以有效地降低该峰值力；诱导槽的深度不小于切削深度效果更佳；诱导槽的宽度过大，会导致二次峰值力的增加，且刀具通过该诱导槽之后切削力会出现较大波动。与传统的抽屉式蜂窝防爬器相比，蜂窝切削复合式防爬器不仅吸能能力极为优秀，还能更换部件，具有可重复利用的特性。新型内外双切削式防爬器能将切屑从管内顺利排出，从而避免了切屑堆积。对比单切削式的防爬器，新型内外双切削式防爬器的吸能性能更优。
Abstracts:
［Objective］ Currently, the CAC (cutting-type anti-climber) faces the issue of excessively high initial peak cutting force, leading to cutting tool detachment or fracture and finally the anti-climber failure. Moreover, the existing double-cutting type anti-climbers are prone to the accumulation of internal chips within the pipe. Therefore, the study on new CAC for urban rail transit vehicles is necessary. ［Method］ First, a CAC finite element model is established. The simulation results of CAC cutting force and collision energy absorption are compared with the experimental results in relevant literature to verify the accuracy of the finite element model simulation method. The working principles of the honeycomb composite CAC and the improved internal-external double CAC are introduced. The cutting performance of two new CAC devices is analyzed through finite element model simulation calculations. ［Result & Conclusion］ Setting an induction groove at the position where the CAC initial peak force occurs can effectively reduce the peak force. The depth of the induction groove should not be less than the cutting depth for optimal results. But excessive width of the induction groove increases the secondary peak force and causes significant fluctuations in cutting force after the cutting tool passes through the induction groove. In comparison with the conventional drawer-type honeycomb anti-climbers, the honeycomb composite CAC not only exhibits excellent energy absorption capacity, but also allows for component replacement, making them reusable. The new internal and external double CAC can smoothly discharge the chips from the pipe, thereby avoiding the chip accumulation. Compared to a single CAC, the new internal-external double CAC demonstrates superior energy absorption performance.
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