铁道标准设计2018，Vol.62Issue(5)：25-29,5.DOI:10.13238/j.issn.1004-2954.201705150004
基于TMD的钢弹簧浮置板轨道结构改进研究
Research on Steel Spring Floating Slab Track Improvement Based on TMD
摘要
Abstract
In order to improve the performance of steel spring floating slab track (SSFSTs) of low-frequency vibration control,a coupled dynamic model of metro vehicle-steel spring floating slab track is established with finite element method to improve the structure design of the common steel spring floating slab track with convex block. With reference to an actual metro line, the optimal stiffness and damping coefficient of the damping element under the convex block of the steel spring floating slab track are determined based on the modal analysis and the harmonic response analysis of the steel spring floating slab track, the turned mass damper (TMD) fixed-point theory, and the identification method of equivalent mass for multi-degree-of-freedom systems. Further,the effectiveness of low-frequency vibration control of the SSFSTs subject to dynamic train loads before and after revision is evaluated based on the vehicle-track coupled dynamic model. The results show that the revised SSFST can effectively absorb low-frequency vibration energies of the SSFST adjacent to natural frequencies; the reasonable TMD parameters can effectively suppress low-frequency vibration of the SSFST under dynamic train load and reduce the transmission of steel-spring supporting counter forces to nearby foundations.关键词
钢弹簧浮置板轨道/低频域制振/TMD/模态分析/列车动荷载Key words
Steel spring floating slab track/Low-frequency vibration control/Turned mass damper/Modal analysis/Dynamic train load分类
交通工程引用本文复制引用
张龙庆..基于TMD的钢弹簧浮置板轨道结构改进研究[J].铁道标准设计,2018,62(5):25-29,5.基金项目
中国铁路设计集团有限公司重点课题(7216189) （7216189）
