铁道科学与工程学报2018，Vol.15Issue(5)：1095-1102,8.
车辆−轨道耦合作用下桥上减振双块式无砟轨道减振性能研究
Study on the vibration reduction performance of double-block ballastless damping track on bridge under vehicle-track coupling effect
摘要
Abstract
According to the vehicle-track coupling dynamics theory, a high-speed railway vehicle–track-bridge coupling model is established in this article. And by FFM method, the dynamic responses of the track and bridge in the double-block ballastless damping track structure are studied respectively both in time domain and in frequency domain. Besides, the damping effect of the rubber damping layer is also studied. The results show that, in time domain, the vertical displacement of rails and slabs increase and the vertical displacement of the slab at the end of the bridge increases dramatically. The vertical acceleration of rails and slabs also increase, but the vertical acceleration at the middle of the bridge decreases. In frequency domain, the acceleration vibration level of the bridge decreases by 5 dB which demonstrates a good damping effect of the damping layer. Moreover, it makes an obvious damping effect from10~40 Hz. However, the acceleration vibration level of the slabs increases by 8 dB. Obviously, after sentry the damping layer in the track structure, much more vibration energy is stored in the slabs which is unfavorable to the slab performance.关键词
双块式无砟轨道/减振/车辆轨道耦合动力学/1/3倍频程Key words
double-block ballastless track/vibration reduction/vehicle-track coupling dynamics/1/3 octave分类
交通工程引用本文复制引用
付娜,李成辉,赵振航,亓伟..车辆−轨道耦合作用下桥上减振双块式无砟轨道减振性能研究[J].铁道科学与工程学报,2018,15(5):1095-1102,8.基金项目
国家自然科学基金资助项目(51278431) （51278431）
国家杰出青年科学基金资助项目(51425804) （51425804）
高速铁路基础研究联合基金重点资助项目(U1334203&U1234201) （U1334203&U1234201）
