随机轮轨动态激励对钢弹簧浮置板轨道减振性能影响分析  

ANALYSIS OF VIBRATION REDUCTION EFFECT OF STEEL SPRING FLOATING SLAB TRACK INDUCED BY RANDOM WHEEL-TRACK DYNAMIC EXCITATION

作　　者：李明航 王文斌 李喆[2] 吴宗臻 张胜龙 LI Ming-hang;WANG Wen-bin;LI Zhe;WU Zong-zhen;ZHANG Sheng-long(China Academy of Railway Sciences Corporation Limited,Urban Rail Transit Center,Beijing 100081,China;Beijing Jiaotong University,School of Civil Engineering,Beijing 100044,China)

机构地区：[1]中国铁道科学研究院集团有限公司城市轨道交通中心,北京100081 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《工程力学》2024年第S01期292-299,345,共9页Engineering Mechanics

基　　金：中国铁道科学研究院集团有限公司基金项目(2022YJ041);北京市自然科学基金-丰台轨道交通前沿研究联合基金项目(L221001)。

摘　　要：为分析随机轮轨不平顺对钢弹簧浮置板轨道减振性能影响,该文采用随机模拟的方法,研究了不同轨道不平顺状态下随机车轮不圆顺在浮置板轨道插入损失评估结果方面的随机特性,以及轨道不平顺发展对插入损失评价结果的影响。研究结果表明:不同轨道不平顺状态下,随机车轮不圆顺作用下隧道壁最大Z振级的插入损失离散超过10 dB,且随着轨道不平顺的发展,插入损失的样本均值和标准差均明显减小;分频插入损失统计结果显示,轨道不平顺的发展对频率低于6.3 Hz的插入损失影响更加显著,对于20 Hz以上频段的统计均值的影响并不明显。In order to analyze the impact of random wheel-rail irregularity on the vibration reduction effect of steel spring floating slab track(SSFST),the random simulation method is used to study the random characteristics of random wheel irregularity on the evaluation results of insertion loss(IL)of SSFST under different track irregularity states,and the influence of track irregularity development on the evaluation results of IL.The research results indicate that under different track irregularities,the difference of IL on the tunnel wall VLZ,max induced by random wheel irregularity is more than 10 dB discrete,and as the track irregularity develop,the sample mean and standard deviation of the IL of VLZ,max significantly decrease.The statistical results of frequency division IL show that the development of track irregularities has a more significant impact on frequency division IL under 6.3 Hz,and that the impact on the statistical mean of frequencies above 20 Hz is not significant.

关 键 词：钢弹簧浮置板轨道 轮轨不平顺 减振效果 列车振动 地铁 

分 类 号：U211.5[交通运输工程—道路与铁道工程] U213.2