基于落锤激励的某新型减振扣件减振性能分析

摘要

A new type of damper fastener is tested by using the hammer excitation method,and the damping performance is analyzed from four aspects(transmission rate; transmission loss rate;transmission loss and Z vibration level).The results show that in the range of 4~200 Hz,the transmission rate is mainly below 2.5%;the transmission loss rate is mainly above 97.5%;the transmission loss is mainly above 32 dB;and after calculating the track vertical vibration acceleration,Z vibration level is 86.15 dB;compared with the ordinary damper fastener,the vibration attenuation performance of the new type damper fastener has been significantly improved.The test shows that the hammer excitation method is effective,convenient operation,which is an excellent test method for the vibration attenuation performance of damper fasteners.%采用落锤激励,对某新型减振扣件进行现场测试,从传递率、传递损失率、传递损失及Z振级等四个方面对其减振性能进行分析.结果表明,在4~200 Hz范围内,传递率基本都在2.5%以下;传递损失率基本都在97.5%以上;传递损失基本都在32 dB以上;道床垂向振动加速度经过计算后,其Z振级为86.15 dB;跟普通减振扣件相比,新型扣件的综合减振性能有了明显地提高.试验表明,落锤激励法操作方便,行之有效,是测试扣件减振性能的优良方法.