铁道标准设计2017，Vol.61Issue(4)：1-5,5.DOI:10.13238/j.issn.1004-2954.2017.04.001
不同减振垫刚度下板式轨道减振特性研究
Study on Vibration Reduction Characteristic of Slab Track with Different Rubber Absorber Stiffness
摘要
Abstract
Slab track with rubber absorber is widely used to reduce the influence of train operation on the surrounding environment, which ensures the compliance of the vibration with specification requirements.Based on wheel-track coupling dynamics, an urban train-slab track with rubber absorber-infrastructure model is established to analyze the modal and resonance of the slab track with rubber absorbers of different stiffness, and the vibration reduction performance is also studied.Research results show that: (1) the natural frequency of the slab track with rubber absorber increases with the increase of stiffness, and the vibration mode includes translation, rotation and bending of the track slab as well as rollover and twist of the rail;(2) the transmission loss from rail to track ranges from 15dB to 30dB with the peak up to 51dB from track to foundation;(3)car-body acceleration, wheel-rail vertical force, rail acceleration and foundation acceleration increase with the increase of the rubber absorber stiffness, while, the rail displacement, track slab acceleration and displacement tend to decrease;(4) the slab track with rubber absorber tends to have better damping effect at 25~100Hz frequency, especially at 1/3 octave band center frequency of 63Hz, the insertion loss is up to 24dB;and the effect at 1~25Hz is general and vibration amplification appears in some frequency bands.关键词
减振垫/插入损失/1/3倍频程加速度振级/模态/振型/耦合动力学Key words
Rubber absorber/Insertion loss/One-third octave average acceleration level (VAL)/Modal/Mode of vibration/Coupling dynamics分类
交通工程引用本文复制引用
于鹏,蔡向辉,蔡小培,孔凡兵,刘启宾,谭诗宇..不同减振垫刚度下板式轨道减振特性研究[J].铁道标准设计,2017,61(4):1-5,5.基金项目
国家自然科学基金资助(51578053,61134003) （51578053,61134003）
中铁第一勘察设计院集团有限公司科研项目(院科12-17) （院科12-17）
