弹性车轮减振降噪特性分析  

Analysis of Vibration and Noise Reduction Characteristics of Resilient Wheel

作　　者：刘玉霞[1] 韩健[1] 周信[1] 彭金方[1] 肖新标[1] 金学松[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《铁道学报》2015年第6期48-53,共6页Journal of the China Railway Society

基　　金：国家自然科学基金(U1434301;51475390);国家科技支撑计划(2015BAG12801)

摘　　要：弹性车轮广泛应用于城市有轨电车,能有效降低轮轨噪声。弹性车轮的基本结构是在车轮轮箍和轮心之间嵌装弹性橡胶件。本文基于TWINS滚动噪声模型,利用有限元-边界元法,建立弹性车轮滚动噪声预测模型,通过仿真预测弹性车轮应用于地铁时的噪声辐射水平,并分析弹性车轮橡胶参数对振动声辐射的影响。计算结果表明:在本文选取参数范围内,激励相同时,橡胶的阻尼损耗因子取0.5、弹性模量取2 300MPa时弹性车轮振动最小,与标准地铁车轮相比降低6dB(A)。Resilient wheels ,which are widely used in city tram ,can effectively reduce the wheel‐rail noise . The structure of the resilient w heel is such that a viscoelastic rubber layer is inserted betw een the steel tire and the wheel center .Based on the model of TWINS rolling noise , using a hybrid finite element method and boundary element method（FEM‐BEM ） , an resilient w heel rolling noise prediction model w as established to predict by simulation the noise radiation levels when the resilient wheels were applied in the subway . The effect of viscoe‐lastic layer parameters of resilient wheels on vibration sound radiation was analyzed as well . The calculation re‐sults show ed that the resilient w heel had the minimum w heel vibration in the range of selected parameters of viscoelastic layer , given the same excitation , with a damping loss factor 0.5 and an elastic modulus of 2 300 MPa .It can decrease 6 dB（A） compared with the rigid wheel .

关 键 词：轮轨噪声 弹性车轮 振动声辐射 有限元法 边界元法 

分 类 号：TB533.2[理学—物理] U211.5[理学—声学]