噪声与振动控制2019，Vol.39Issue(3)：18-23,55,7.DOI:10.3969/j.issn.1006-1355.2019.03.004
轨道参数对轮轨耦合系统固有频率的影响
Influence of Track Parameters on Natural Frequencies of Wheel-track Coupling Systems
摘要
Abstract
The natural vibration characteristics of wheel-rail system have an important influence on the formation and development of wheel out-of-roundness and rail corrugation. In this study, the finite element model of a monolithic bed track with short sleepers and the finite element model of unsprung mass and track coupling system are established respectively. The effects of fastener stiffness, foundation stiffness, unsprung mass and sleeper spacing on the natural frequencies of the track and the coupling system are analyzed. The results show that the first-order vertical bending frequency of the track increases with the increase of fastener stiffness, and the foundation stiffness has little influence on the first-order vertical bending frequency of the track. The first-order vertical bending frequency (P2 resonance frequency) of the coupling system increases with the increase of fastener stiffness and decreases with the increase of unsprung mass. The resonance frequency of P2 increases with the increase of foundation stiffness. When the foundation stiffness is greater than 300 MPa/m, it has little effect on the P2 resonance frequency. for certain fastener stiffness and foundation stiffness,The first-order vertical bending frequency of the track and the P2 resonance frequency decrease with increasing the sleeper spacing. The random variation of the sleeper spacing can reduce the peak value of pinned-pinned resonance response. The model is validated by the results of field hammering impact test and track vibration test.关键词
声学/轨道/轨枕间距/簧下质量/有限元分析/谐响应分析Key words
acoustics/ track/ sleeper spacing/ unsprung mass/ finite element analysis/ harmonic response analysis分类
交通工程引用本文复制引用
马维国,关庆华,钟文生,陶功权,金学松,温泽峰..轨道参数对轮轨耦合系统固有频率的影响[J].噪声与振动控制,2019,39(3):18-23,55,7.基金项目
国家自然科学基金资助项目(11427801) （11427801）
