Engineering Research Center of Railway Environment Vibration and Noise Ministry of Education, East China Jiaotong University, Nanchang 330013, China.
Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore.
Sensors (Basel). 2019 Jan 5;19(1):168. doi: 10.3390/s19010168.
This study proposed a novel vibration mitigation slab track plate design to mitigate the vibration induced in urban rail transit operations. The optimal recipe for the newly designed slab track plate is obtained by a series of laboratory tests, and both newly designed vibration mitigation slab track plates and normal slab track plates are fabricated and hereinafter tested. The newly designed slab track plate was examined with a series of laboratory tests in comparison with the normal slab track plate. The PolyMAX method is then adopted for extracting the modal properties, including resonant frequencies, and damping ratios are also determined for both the designed slab and normal slab track plates. A vibration mitigation level () is defined to address the vibration mitigation performance taking the acceleration response of the normal slab track plate as reference. The newly designed slab track plate demonstrated better dynamic and damping characteristics in comparison with the normal slab track plate. Under the same excitation force, the newly designed slab track plate can mitigate 8.9 dB on average in the frequency range [20, 400] Hz, expressing the feasibility of effective vibration mitigation capacity.
本研究提出了一种新颖的减振垫板轨道板设计，以减轻城市轨道交通运营引起的振动。通过一系列实验室试验获得了新设计的轨道板的最佳配方，并制造了新设计的减振垫板轨道板和普通轨道板进行了以下测试。新设计的轨道板通过一系列实验室测试与普通轨道板进行了比较。然后采用 PolyMAX 方法提取模态特性，包括共振频率，并确定了设计的轨道板和普通轨道板的阻尼比。定义了减振水平（），以解决减振性能问题，将普通轨道板的加速度响应作为参考。与普通轨道板相比，新设计的轨道板具有更好的动力和阻尼特性。在相同的激励力下，新设计的轨道板在[20,400]Hz 的频率范围内平均可减振 8.9dB，表明具有有效的减振能力。
