A magnetorheological elastomer rail damper for wideband attenuation of rail noise and vibration
A magnetorheological elastomer rail damper for wideband attenuation of rail noise and vibration
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DOI：
10.1177/1045389x19873406
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发表时间：
2019-08-30
影响因子：
2.7
通讯作者：
Li, Weihua
中科院分区：
文献类型：
--
作者：
Sun, Shuaishuai;Yang, Jian;Li, Weihua
轨道的噪声和振动效应会对铁路周围的环境产生重大影响。钢轨阻尼器是安装在钢轨侧面的元件，它能改善钢轨的轨道衰减率，从而提高钢轨的减振降噪能力。然而，在实际应用中，最有效的钢轨阻尼器设计仍然不能调整其自身的参数以适应不同的要求，因为其刚度和阻尼在设计后是固定的。在这项工作中，一个可调磁流变弹性体轨道阻尼器的工作原理的动力吸振器已被设计，分析，表征和实验测试的抑制铁路噪声和振动。新型钢轨阻尼器采用了变刚度磁流变弹性体层，其刚度可通过外加磁场控制，实现自适应特性。利用电磁振动台对磁流变弹性体减振器进行了试验研究。随后，对UIC-60钢轨在不同钢轨阻尼器和无钢轨阻尼器情况下的轨道衰减率进行了理论预测;仿真结果表明，磁流变弹性体钢轨阻尼器与常规钢轨阻尼器相比，能够在更宽的频率范围内改善钢轨的轨道衰减率，因此磁流变弹性体钢轨阻尼器的钢轨噪声性能优于常规钢轨阻尼器还原
The noise and vibration effects of rails can have a significant impact on the environment surrounding the railways. Rail dampers are elements that are attached to the sides of the rail and can improve the track decay rate of rail and then enhance the rails' ability to attenuate noises and vibrations. However, in practical applications, the most efficient rail damper design still cannot adjust its own parameters to adapt to different requirements because their stiffness and damping are fixed after designed. In this work, a tunable magnetorheological elastomer rail damper that works on the principle of a dynamic vibration absorber has been designed, analysed, characterised, and experimentally tested for the suppression of railway noise and vibration. The new rail damper incorporates variable stiffness magnetorheological elastomer layers, whose stiffness can be controlled by an externally applied magnetic field, to realise adaptive characteristics. Experimental characterisations of the magnetorheological elastomer rail damper were performed with an electromagnetic shaker. Subsequently, theoretical predictions of the track decay rate of a UIC-60 rail with different rail dampers and without rail damper were conducted; simulation results verified that magnetorheological elastomer rail dampers can improve the track decay rate of rail over a wider frequency range compared to conventional rail dampers and thus the performance of the magnetorheological elastomer rail damper outperforms other conventional rail dampers on rail noise reduction.