浮置板组合道床系统振动控制效果分析

Analysis on Vibration Control Effect of Floating Slab Combined Track System

介绍了一种用于轨道交通的新型浮置板组合道床系统的结构和特点。利用动力吸振原理,设计了谐振单元,实现对道床主振动系统的动力调谐消振。同时,结合多种减振措施,有效降低了轨下部分振动能量的传递。在线测试结果表明,组合道床系统采用浮轨扣件,轨道动态变形均满足轨道安全性要求;依据GB 10071-1988测试评价方法,垂向和横向减振效果分别为18.7 dB和10.8 dB;依据CJJ/T 191-2012测试评价方法,垂向和横向减振效果分别为20.4 dB和11.7 dB,可以满足特殊减振地段的减振要求。

The structure and characteristics of a new floating slab combined track system for railway tracks were introduced.A resonance unit was designed by adopting the principle of dynamic vibration absorption to achieve dynamic tuning and vibration elimination on the main vibration system of the track.At the same time,combined with a variety of vibration reduction measures,the transmission of vibration energy under rail was effectively reduced.The online test results showed that the combined slab track used floating rail fasteners and that the dynamic deformation could meet the track safety requirements.According to the test and evaluation method of standard GB 10071-1988,the vertical and lateral vibration damping effects were 18.7 dB and 10.8 dB,respectively.According to the test and evaluation method of standard CJJ/T 191-2012,the vertical and lateral damping effects were 20.4 dB and 11.7 dB,respectively.The floating slab combined track could meet the damping requirements of special vibration reduction regions.