车轮多边形对地铁转向架的影响研究
金伟徐步震任明
Research on the Impact of Wheel Polygonalization on Metro Bogies
JIN WeiXU BuzhenREN Ming
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作者信息:中车南京浦镇车辆有限公司
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Affiliation:CRRC Nanjing Puzhen Co., Ltd., 210031, Nanjing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.05.003
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中图分类号/CLCN:U270-33
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栏目/Col:研究报告
摘要:
［目的］研究车轮多边形对地铁转向架的影响，从而加强车轮多边形的管控要求，提升转向架的运行品质及安全性能。［方法］在介绍车轮多边形概念及多边形的数学表达式的基础上，采用车轮不圆度测试、模态测试、振动测试和应力测试等方法对某型地铁转向架进行对比测试。［结果及结论］根据测试数据可知：车轮多边形会引起轴箱位置的主频振动；车轮多边形会放大轴箱振动量级，含明显车轮多边形的试验对象产生的轴箱振动增加18%；当车轮的多边形激励频率与结构模态频率接近时，其结构应力会大幅增加，且关键测点应力增大2倍以上，车轮多边形对结构强度有着较大的影响。
Abstracts:
［Objective］ The objective is to investigate the impact of wheel polygonalization on metro bogies, thereby strengthening the control requirements for wheel polygonalization, and enhancing the operational quality and safety performance of bogies. ［Method］ Based on the introduction of the concept of wheel polygonalization and the mathematical expression of polygonalization using methods such as wheel off roundness testing， modal testing, vibration testing, and stress testing， type of metro is comparativety tested. ［Result & Conclusion］ According to the test data: wheel polygonalization can cause main frequency vibration of the axle box position; wheel polygonalization can amplify the magnitude of axle box vibration, with the test object containing obvious wheel polygonalization resulting in an 18% increase in axle box vibration; when the excitation frequency of wheel polygonalization is close to the structural modal frequency, the structural stress will increase significantly, with the stress at key measuing points increasing by more than twice, indicating that wheel polygonalization has a significant impact on structural strength.
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