摘要
为探究地铁车辆阻尼环扩张状态对阻尼环车轮声振特性影响,在半消声室内进行阻尼环车轮自由状态下的声振特性实验研究,结合有限元仿真对实验结果进行分析。研究表明,环-轮组合振动固有频率与原车轮相比变化不大,但阻尼环使车轮的模态阻尼比显著增加,有效抑制了车轮各模态的振动幅值。改变阻尼环扩张状态,阻尼环降噪效果发生非线性变化,幅值在5.6 dB(A)之内。阻尼环扩张状态可通过调节非闭合阻尼环两端扩张装置来改变。阻尼环处于非最大扩张状态W_3时,可获得最佳降噪效果。
In order to investigate the influence of damping ring expansion on the sound and vibration characteristicsof the damping ring wheel of metro vehicle,the acoustic and vibration characteristics of the dampingring wheel were studied in the semi-anechoic chamber.The experimental results were analyzed combined withfinite element simulation.The results show that the damping ring does not change the natural frequency of thewheel,but the damping ring will significantly increase the modal damping ratio of the wheel and effectivelysuppress the vibration amplitude of each mode of the wheel.Changing the damping ring expansion state leadsto nonlinear changes in the damping ring noise reduction,the noise reduction amplitude is within5.6dB(A).The damping ring expansion state can be changed by adjusting the end of the non-closed damping ring expansiondevice.When the damping ring is in the non maximum expansion state W_3,the optimum noisereduction effect can be obtained.
作者
邓新
张学飞
耿卓
王加政
徐秋婷
储丽霞
DENG Xin;ZHANG Xuefei;GENG Zhuo;WANG Jiazheng;XU Qiuting;CHU Lixia(School of Urban Rail Transit, Changzhou University, Changzhou 213164, China;Southwest Jiaotong University Changzhou Institute of Rail transport, Changzhou 213164, China)
出处
《应用声学》
CSCD
北大核心
2017年第5期455-461,共7页
Journal of Applied Acoustics
关键词
阻尼车轮
预紧力
声振特性
激励
Damping wheel
Preload
Acoustic vibration characteristics
Excitation
作者简介
邓新(1994-),男,安徽合肥人,硕士研究生,研究方向:动力工程;通讯作者E-mail:dx110119@163.com
