中南大学学报（自然科学版）2025，Vol.56Issue(5)：2099-2107,9.DOI:10.11817/j.issn.1672-7207.2025.05.034
层间约束对板-垫复合装配式轨道减振性能影响研究
Effect of interlayer constraint on vibration reduction performance of assembly track with slab-mat composite
摘要
Abstract
To analyze the influence of interlayer constraints on vibration reduction performance of assembly track with slab-mat composite,an assembly track with trapezoidal section was taken as an example.Firstly,a wheel-drop test was conducted to obtain the natural frequency without loading of track structure in different constraint states,and the equivalent stiffness under slab was calculated,the contribution of constraints to slab stiffness was clarified.Then,the stiffness of rubber mat with loading was analyzed,a vehicle-track-tunnel coupled dynamic model was established based on the stiffness contributions,the influence of constraints on vibration reduction performance was analyzed at different vehicle speeds and under fastener stiffness conditions.The results show that the natural frequency of track structure without loading gradually increases with the increase of constraint state,and the vibration reduction performance decreases.In constraint states of A,B,and C,the equivalent stiffness provided by interlayer constraints is 0.003 4,0.004 9,and 0.008 1 N/m3,respectively,accounting for 21.5%,32.7%,and 58.7%of the dynamic stiffness of the rubber mat with loading.Compared to not considering constraints,the vibration reduction performance of constrained states A,B,and C decreases by an average of 1.8,2.2,and 3.2 dB under different vehicle speed conditions,and by an average of 1.0,1.3,and 2.2 dB under different fastener stiffness conditions.Neglecting interlayer constraints can overestimate the vibration reduction performance of the assembly track with slab-mat composite during the service phase,and should be considered in the evaluation of vibration reduction performance during the design phase.关键词
装配式轨道/板-垫复合/减振性能/层间约束/车-轨耦合Key words
assembly track/slab-mat composite/vibration reduction performance/interlayer constraint/vehicle-track coupling分类
交通工程引用本文复制引用
王朋松,辛涛,陈鹏,王森,孔超,成棣..层间约束对板-垫复合装配式轨道减振性能影响研究[J].中南大学学报（自然科学版）,2025,56(5):2099-2107,9.基金项目
国家重点研发计划项目(2022YFB2602900) （2022YFB2602900）
高等学校学科创新引智计划项目(B20040) （B20040）
中国铁道科学研究院集团有限公司科技研究开发计划项目(2022YJ280)(Project(2022YFB2602900)supported by the National Key R&D Program of China （2022YJ280）
Project(B20040)supported by the 111 Project （B20040）
Project(2022YJ280)supported by the Science Technology Research and Development Program of China Academy of Railway Sciences Co.Ltd.) （2022YJ280）
