城市轨道交通钢轨波磨诱发的轮轨噪声特性研究
王蕊
Study on the Characteristics of Wheel/Rail Noise Caused by Rail Corrugation in Urban Rail Transit
WANG Rui
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作者信息:成都轨道建设管理有限公司， 610031， 成都
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Affiliation:Chengdu Railway Construction Management Co., Ltd., 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.2022.10.006
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中图分类号/CLCN:U213.4+2;TB533+.2
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栏目/Col:研究报告
摘要:
城市轨道交通中钢轨的波磨问题不仅会影响钢轨的使用寿命，还会诱发轰鸣噪声，影响乘车环境。为探究钢轨波磨诱发轮轨轰鸣噪声的特性，开展现场波磨测试，获取真实的波磨状态下轨道不平顺数据。基于列车轨道耦合动力学，对比常采用的美国6级轨道高低不平顺谱，分析了在实测的波磨短波不平顺激励条件下的轮轨相互作用力。将轮轨相互作用作为激励条件，分别输入考虑了详细约束条件的轮轨有限元模型中，结合边界元方法预测并分析了波磨条件下的轮轨噪声辐射特性。结果表明，钢轨波磨会显著增加轮轨振动频率在200 Hz以上的相互作用，使得轮轨振动加剧，从而导致轰鸣噪声产生。
Abstracts:
The problem of rail corrugation in urban rail transit not only affects the rail service life, but also causes large booming noise, influencing the traveling environment. To study the characteristics of wheel/rail booming noise caused by rail corrugation, a corrugation field test is carried out to obtain track irregularity data under real corrugation condition. Based on the train-track coupling dynamics, compared with the commonly used Grade VI track irregularity of the United States, the wheel/rail interactive force under condition of measured corrugation short wave irregularity excitation is analyzed. Wheel/rail interactive force is taken as excitation condition and input into wheel/rail finite element model with detailed constraints respectively, combined with boundary element method, the wheel/rail noise radioactive characteristics under corrugation condition are predicted and analyzed. Results show that the rail corrugation will significantly increase the wheel/rail interactive force in the range above 200 Hz frequency, intensifying wheel/rail vibration, resulting in the generation of booming noise.
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