车轮扁疤状态下的铁路货车动力学表征研究

丁春嵘; 彭莘宇; 汪群生

doi:10.13433/j.cnki.1003-8728.20200205

车轮扁疤状态下的铁路货车动力学表征研究

doi: 10.13433/j.cnki.1003-8728.20200205

1.
神华铁路装备有限责任公司, 河北沧州 061113
2.
西南交通大学牵引动力国家重点实验室, 成都 610031

基金项目:

国家自然科学基金项目 U2034210

牵引动力国家重点实验室自主课题项目 2019TPL-T18

详细信息

作者简介:
丁春嵘(1972-), 高级工程师, 研究方向为铁道机车车辆检修, dcr306@163.com

通讯作者:
汪群生, 助理研究员, 博士, wangqunsheng@126.com

中图分类号: U272
计量
- 文章访问数: 162
- HTML全文浏览量: 68
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2020-03-28
- 刊出日期: 2021-10-09

Research on Dynamic Characterization of Railway Freight Car under Wheel Flat Condition

1.
Shenhua Railway Equipment Co., Ltd., Cangzhou 061113, Hebei, China
2.
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China

摘要

摘要: 为研究货车车轮扁疤状态下的动力学表征, 为车轮扁疤的间接识别提供理论支撑, 建立了配置有转K6转向架的C80铁路货车动力学模型, 并推导了扁疤对钢轨的垂向冲击力公式及振动加速度公式, 研究了车轮扁疤故障状态下的车轮轮轨力响应、承载鞍振动响应情况, 并分析了故障状态下车轮扁疤长度与轮轨垂向力对应关系, 为扁疤的故障检测和识别提供基础支撑。结果表明: 扁疤故障状态下, 轮轨垂向力与扁疤长度呈正比例关系, 且轮轨力最大值随车辆运行速度增大而呈现先增大后缓慢减小的趋势, 承载鞍振动加速度变化趋势与轮轨垂向力基本保持一致。
- 车轮扁疤 /
- 铁路货车 /
- 故障检测 /
- 垂向冲击 /
- 振动加速度
Abstract: To study the dynamic characterization of the railway wagon under wheel flat condition, and provide theoretical support for the indirect identification of flat fault, a C80 railway wagon dynamic model with K6 bogie is established, and the formulas of vertical impact force and vibration acceleration of adapter which under the impact of flat has been derived. The responses of wheel and rail force and adapter vibration under flat fault are studied. What's more, the relationship between the length of the flat and the vertical force of the wheel and rail under the fault state is analyzed, which can provides the basic support for the fault detection and identification of the flat. The results show that: the vertical force of wheel and rail is proportional to the length of the flat, and the maximum of wheel and rail force increases first and then decreases slowly with the increase of vehicle speed. The adapter acceleration has a same change trend with the vertical force of wheel and rail.
- wheel flat /
- wagon /
- fault detection /
- vertical impact /
- vibration acceleration

HTML全文

图 1 C80货车动力学仿真模型

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图 2 车轮旧扁疤深度随长度变化关系

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图 3 车轮扁疤理论计算图示

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图 4 车速60 km/h, 扁疤长度20 mm时轮轨垂向力的时域图

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图 5 空车下不同车速扁疤长度对轮轨最大垂向力的影响

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图 6 重车下60 km/h, 30 mm扁疤时轮力时域图

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图 7 重车下不同车速扁疤长度对轮轨最大垂向力的影响

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图 8 不同扁疤长度车速对承载鞍振动加速度的影响

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表 1 车辆各轮轮轨垂向力最大值对比

轮对编号	左轮/kN	右轮/kN
1	62.387	73.097
2	28.043	28.144
3	28.231	28.389
4	27.622	27.613

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