路基工程Issue(4)：5-10,6.DOI:10.13379/j.issn.1003-8825.2017.04.02
Vossloh300扣件阻尼频变对高铁高频振动的影响研究
Influence of Frequency-dependent Damping of Vossloh300 Fastener on High-frequency Vibration of High-speed Train
摘要
Abstract
Taking Vossloh300 fastener pad as the study object,its energy consumption stiffness at the temperature between-60 ℃ ～20 ℃ was measured with universal testing machine equipped with temperature box.On this basis,together with temperature-frequency superposition principle and Timoshenko beam model for vehicle-track coupling dynamics,how the frequency-dependent damping of such fastener influences the dynamic characteristics of the wheel-track system,was explored in the frequency domain.The results show that,for Vossloh300 fastener pad,its damping coefficient is 152.2 kN/(m · s-1) at 20 ℃ and 4Hz excitation frequency.The frequency-dependent damping of Vossloh300 has primary effect on the vibration response of vehicle-track vertical coupling system at 1/3 OCT with center frequency above 22 Hz:①the middle-high frequency vibration at 22 ～ 56 Hz of vehicle-track system is increased,but the high frequency vibration at 60 ～ 256 Hz decreased;②in the range of 512 ～ 1500 Hz,the maximum 1/3 OCT acceleration-vibration level perpendicular to the track is increased by 5 dB,at the same time,the maximum 1/3 OCT amplitude of fastener force decreased by 92 ％.Therefore,to predict accurately the random vibration response of high-speed railway vehicle and the structure under wheel,it is required to consider the frequency-dependent damping characteristics of fastener pad.关键词
频变刚度/Vossloh300扣件胶垫/高频振动/Timoshenko梁模型Key words
frequency-dependent damping/vossloh300 fastener pad/high-frequency vibration/Timoshenko beam model分类
交通工程引用本文复制引用
杨麒陆,王平..Vossloh300扣件阻尼频变对高铁高频振动的影响研究[J].路基工程,2017,(4):5-10,6.基金项目
国家自然科学基金高铁联合基金项目(U1434201,U1234201) （U1434201,U1234201）
国家杰出青年科学基金项目(51425804) （51425804）
