摘要
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 m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150~400 Hz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倍~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。
In order to provide a feasible solution to control the rail corrugation occurring at the section of Egg system on the Beijing metro,a laboratory test was conducted to compare the dynamic properties of Egg system track structures with and without TRD on a 25 m test track. The experimental results indicate that the TRD can obviously optimize the rail dynamic characteristics of the track using Egg fastening system in the range of 150- 400 Hz. On one hand,the resonance peaks on frequency response function curve,identified as the cause of the rail corrugation occurring at Egg fastening system track sections,are obviously moved. On the other hand,the vertical vibration decay rate is obviously increased up to 4- 8 times more than the case without TRD,suppressing the vertical vibration transited along the rail. Meanwhile,the lateral vibration decay rate along the rail is raised by TRD as well,which contributes to increase the lateral stability of track.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第14期209-214,共6页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51408033)
中央高校基本科研业务费专项资金资助(2016JBM046)
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
metro
tuning rail damper（TRD）
track system dynamic characteristics test
Egg fastening system
rail corrugation
