双嵌入式环形阻尼车轮声振特性  

Vibration and Acoustic Characteristics of the Wheels with Doubly Embedded Damping Rings

作　　者：刘玉霞[1,2] 周信[1] 刘晓龙[1] 何远鹏 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,成都610031 [2]西南交通大学材料先进技术教育部重点实验室,成都610031

出　　处：《噪声与振动控制》2015年第3期29-32,共4页Noise and Vibration Control

基　　金：国家自然科学基金(51475390;U1434201);国家863计划(2011AA11A103-2-2)

摘　　要：对地铁车轮内、外侧安装阻尼环后,借助有限元方法对标准车轮进行模态分析,并和试验结果进行对比。通过半消声室内落球撞击试验,研究嵌入式环形阻尼车轮的振动声辐射特性。研究表明,阻尼环几乎不改变车轮的模态特征,对其模态阻尼有较大的影响;径向激励下自由悬挂状态的阻尼环车轮降噪效果为13.6 d B(A),轴向激励下,降噪效果为10.4 d B(A)。The finite element method was employed for modal analysis of a damped wheel. The results were compared with the test results. The damped wheel equips two damping rings which are inserted into the grooves in both sides of its rim. In a semi-anechoic room the vibration and sound radiation characteristics of the wheel were tested by ball-dropping method. The results show that the damping rings have little influence on the modal frequencies of the wheel, but large influence on the modal damping. The sound level of the wheel with the damping rings in the freely suspended state can be reduced by 13.6 d B（A） and 10.4 d B（A） under the radial and axial excitations respectively in comparison with the standard wheels.

关 键 词：振动与波 轮轨噪声 半消声室 阻尼环 振动声辐射 

分 类 号：TG156[金属学及工艺—热处理]