| 地铁车轮辐板安装刹车盘对其声辐射特性的影响 |
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| 引用本文： | 王超,肖新标,金学松,房建英.地铁车轮辐板安装刹车盘对其声辐射特性的影响[J].铁道学报,2011,33(8). |
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| 作者姓名： | 王超 肖新标 金学松 房建英 |
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| 作者单位： | 西南交通大学牵引动力国家重点实验室,四川成都,610031 |
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| 基金项目： | 国家自然科学基金(50521503); 牵引动力国家重点实验室自主研究课题(2008TPL_Z07); “十一五”国家科技支撑计划共性基础及系统集成技术课题(P024132C1117020008); 四川省2010年第二批科技支撑计划项目(2010GZ0226) |
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| 摘 要： | 本文利用数值方法分析地铁车轮辐板安装刹车盘对其声辐射特性的影响。数值分析中,首先根据某新型地铁车轮的实际尺寸建立车轮的三维实体有限元模型,基于模态叠加法计算该车轮在不同激励下的动态响应。计算动态响应时考虑轮轨名义滚动圆处法向单位力、轮缘根部横向单位力和轮轨名义滚动圆处轮轨表面粗糙度等效力3种激励对地铁车轮振动特性的影响。利用有限元算得的车轮振动结果,生成声学网格速度边界条件,通过声学边界元法计算车轮的声辐射特征。分析结果表明,车轮声辐射主要来自车轮辐板轴向贡献,踏面径向贡献相比之下不显著。另外,刹车盘能起到对辐板声屏障的作用,从而衰减来自车轮辐板的噪声辐射。车轮辐板安装刹车盘后,在通过小半径曲线时,可以有效降低轮轨横向力作用下激发出的车轮轴向模态振动噪声,同时对车轮的直线滚动噪声也有一定的抑制作用。另外,刹车盘对车轮轴向辐射声场的指向性有较显著影响。
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| 关 键 词： | 地铁车轮 辐板安装式刹车盘 声辐射特性 有限元法 边界元法 |
Effect of Web-mounted Braking Disc on Sound Radiation Characteristics of a Metro Wheel |
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| WANG Chao,XIAO Xin-biao,JIN Xue-song,FANG Jian-ying.Effect of Web-mounted Braking Disc on Sound Radiation Characteristics of a Metro Wheel[J].Journal of the China railway Society,2011,33(8). |
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| Authors: | WANG Chao XIAO Xin-biao JIN Xue-song FANG Jian-ying |
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| Institution: | WANG Chao,XIAO Xin-biao,JIN Xue-song,FANG Jian-ying(State key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | The effect of the web-mounted braking disc on the sound radiation characteristics of a Metro wheel is analyzed with the numerical method.In the analysis procedure,the three-dimensional finite element model for the wheel is developed and the frequency responses under different excitations are calculated on the basis of the modal summation method.In the dynamic response calculation,three types of exciting forces are considered: the normal unit force at the nominal rolling circle,horizontal unit force at the w... |
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| Keywords: | Metro wheel web-mounted braking disc sound radiation characteristic FEM BEM |
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