【摘要】 针对列车运行时由于轮轨的不平顺造成的车轮振动以及由振动产生辐射噪声的问题,利用颗粒阻尼附加质量小和宽频减振效果好的优点,在车轮踏面上设计颗粒阻尼振动器来衰减和抑制车轮振动和辐射噪声,同时研究两种不同激励载荷作用下的车轮声辐射特性。试验结果表明:相比于空轮以及空心阻尼环,颗粒阻尼器在宽频带内具有优良的振动抑制和降噪效果,在轴向和径向激励载荷作用下,安装颗粒阻尼器可以使车轮的振动大幅衰减,最大减振幅值可达39 dB,最大降噪幅值为14.68 dB(A)。更多还原

【Abstract】 The problem of vibration and noise of wheels caused by wheel rail unevenness are studied. In virtue of the advantage of small mass and good damping effect in a wide frequency range of the particle damping, a particle damper vibrator is designed and installed on the wheel tread to attenuate and suppress the vibration and noise of the wheel. At the same time, the acoustic radiation characteristics of the wheel under two different excitation loads are studied. The experimental results show that the particle dampers have excellent vibration suppression and noise reduction effects in the broadband in comparison with the air wheel and the hollow damping ring wheel. Under the axial and radial excitation loads,the vibration of the wheel can be greatly reduced by the installation of particle dampers, the maximum vibration reduction can reach 39 dB, and the maximum noise reduction can reach 14.68 dB(A).更多还原