纵向轨枕长度对梯式轨道减振性能的影响  

Influence of Different Lengths of Longitudinal Sleepers on Vibration Damping Performance of Ladder Tracks

作　　者：金浩[1] 刘维宁[2] 

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《噪声与振动控制》2015年第2期150-153,共4页Noise and Vibration Control

基　　金：国家自然科学基金项目(51278043)

摘　　要：为研究纵向轨枕长度对梯式轨道减振性能的影响,在现有纵向轨枕长度(6.15 m)的基础上,设计了另外两种纵向轨枕长度(3.65 m和8.65 m)。通过有限元软件Ls-Dyna建立不同纵向轨枕长度的梯式轨道模型,并通过实验室测试,验证其正确性。分析结果表明:纵向轨枕长度为6.15 m的梯式轨道(1)时域内,具有最小的基底振动加速度峰值;(2)1 Hz^200 Hz频段,具有最小的基底振动加速度峰值(峰值频率为49 Hz);(3)除1 Hz^5 Hz频段外,传递损失均大于纵向轨枕长度为3.65 m的梯式轨道传递损失。1.6 Hz^2.2 Hz频段以及7.6 Hz^200 Hz频段,传递损失大于纵向轨枕长度为8.65 m的梯式轨道传递损失。In order to study the influence of longitudinal sleeper＇s lengths on vibration damping performance of ladder tracks, three longitudinal sleepers with the lengths of 3.65 m, 8.65 m and conventional 6.15 m were designed and studied.The ladder track models with different longitudinal sleeper＇s lengths were built by Ls- Dyna code. Results of simulation were compared and verified by those of lab tests. The results show that：（1） The ladder track with 6.15 m sleeper length has the minimum vibration-acceleration peak value of the foundation in time-domain;（2） it has the minimum vibration-acceleration peak value of the foundation in frequency spectrum ranging from 1 Hz to 200 Hz（at frequency 49 Hz）;（3） it has larger value of transfer loss than the ladder track with 3.65 m sleeper length except for the frequency range from 1Hz to 5 Hz;（4） it has larger value of transfer loss than the ladder track with 8.65 m sleeper length in the frequency ranges from 1.6 Hz to 2.2Hz and 7.6 Hz to 200 Hz respectively.

关 键 词：振动与波 梯式轨道 纵向轨枕 传递损失 减振 实验室测试 

分 类 号：U231[交通运输工程—道路与铁道工程]