为了探讨采用调频式钢轨阻尼器（TRD）整治剪切型减振器轨道结构区间异常钢轨波磨的可行性，在长25米的轨道试验平台上采用锤击试验测试了安装TRD前后剪切型减振器轨道的结构动力特性。结果表明：安装TRD可以优化150-400Hz频段内剪切型减振器轨道结构的频响特性与钢轨的竖向振动衰减率。一方面，TRD降低了此频段内的钢轨频响函数峰值，而该频段内的轮轨共振被认为是导致剪切型减振器轨道钢轨波磨产生的主要原因。另一方面，TRD使钢轨竖向振动衰减率提高了4-8倍，抑制了竖向振动沿钢轨纵向的传播；不仅如此，安装TRD后，钢轨的水平向振动衰减率大于原剪切型减振器轨道，即提高了轨道系统沿钢轨纵向对钢轨水平向振动的衰减能力，增强了对钢轨横向振动的约束，在一定程度上增加了轨道的横向稳定性。
Abstract
In order to provide a feasible solution to control the rail corrugation occurred on the section of Egg system on Beijing metro, the presented paper introduced a laboratory test which was conducted to compare the dynamic properties of Egg system track structure with and without TRD on a 25m test track. Experimental results indicated that TRD obviously optimized the rail dynamic characteristics of track using Egg fastening system in the range of 150-400Hz. In one hand, the resonance peaks of frequency response function curve, which was identified as the cause of the rail corrugation occurred on egg fastening system track sections, were obviously moved. In the other hand, the vertical vibration decay rate was obviously increased up to 4~8 times rather than the case without TRD，suppressing the vertical vibration transited along the rail. Meanwhile, the lateral vibration decay rate along the tail was raised by TRD as well, which contributed to increase the lateral stability of track.
关键词
地铁 /
调频式钢轨阻尼器 /
轨道动力特性试验 /
剪切型减振器 /
钢轨波磨
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Key words
metro /
Tuning Rail Damper (TRD) /
track system dynamic characteristics test /
Egg fastening system /
rail corrugation
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