浮置板轨道结构减振性能的落轴试验

Test on Vibration Reduction Performance of Different Floating Slab Track Structures

对两种不同阻尼比的隔振器（1型隔振器的阻尼比小于2型隔振器）浮置板轨道结构的减振性能进行落轴试验，并与非浮置状态进行对比。测试结果表明，1型隔振器和2型隔振器浮置板轨道基础的垂向加速度分别比非浮置状态小75％和92％左右；1型隔振器浮置板轨道在8～40Hz和80--315Hz频率范围内的隔振效果最大约为25dB，2型隔振器浮置板轨道在10--200Hz频率范围内的隔振效果为30--40dB。针对此次试验所采用的两种隔振器，认为阻尼比较大的隔振器浮置板轨道的减振性能更好。

Two different types of damp ratios of vibration i- solator FST structures （the damp ratio of Type A is smaller than Type B） based on wheel load drop test are analyzed, the vibration reduction performance of them is compared with the non floating track. The results show that the ver- tical accelerations of vibration isolator FST of Type A and Type B foundation are 75% and 92% respectively, smaller than that of non - floating track. Moreover, the vibration reduction effect of Type A vibration isolator FST is 25dB in the frequency of 8--40 Hz and 80--315 Hz,while the vi- bration isolator FST of Type B is 30--40dB in 100--200 Hz. Through the test of two vibration isolators, it is conclu- ded that the vibration reduction performance of vibration reduction isolator FST with bigger damp ratio is better.