中国铁道科学2024，Vol.45Issue(2)：30-40,11.DOI:10.3969/j.issn.1001-4632.2024.02.03
轮轨激励对橡胶垫浮置板轨道减振效果的影响
The Influence of Wheel-Rail Excitation on the Vibration Reduction Effect of Rubber Pad Floating Slab Track
摘要
Abstract
In order to analyze the vibration reduction effect of rubber pad floating slab track under different wheel-rail irregularity conditions,a comparative in-situ test was performed on two measuring sections including regular ballastless slab track and rubber pad floating slab track(RPFST)in the same straight section of a subway line.The net operating mileage of operating trains and wheels irregularities were synchronously investigated.The results show that when evaluating the vibration control performance of the vibration-damping track,in addition to the objective evaluation of the insertion loss or comparison loss,it is more critical is to analyse whether the vibration responses of the vibration-damping track section will exceed the vibration limit with the enhancement of wheel-rail excitation.The wheels of operating trains on the tested subway line exhibit obvious seventh-to-ninth order polygonal wear characteristics,and with the enhancement of wheel-rail excitation,the evaluation result of△VLZ,max gradually increases.The frequency division vibration reduction effect of RPFST is directly related to the excitation mechanisms of different frequency bands.At the natural frequency(63 Hz)of the fastener system,the increase in wheel-rail excitation leads to a greater increase of the tunnel wall vibration response of regular ballastless slab track;and the comparison loss at 63 Hz increases with the increase of net operating mileage.关键词
地铁/橡胶垫浮置板轨道/减振效果/轮轨激励/列车振动Key words
Metro/Rubber pad floating slab track/Vibration reduction effect/Wheel-rail excitation/Train-induced vibration分类
交通工程引用本文复制引用
李明航,王文斌,吴宗臻,张胜龙,吴泽宇,魏志恒..轮轨激励对橡胶垫浮置板轨道减振效果的影响[J].中国铁道科学,2024,45(2):30-40,11.基金项目
北京市自然科学基金-丰台轨道交通前沿研究联合基金资助项目(L221001) （L221001）
中国铁道科学研究院集团有限公司院基金课题(2022YJ041) （2022YJ041）
