铁道标准设计Issue(8)：8-11,15,5.
纵向轨枕轨道振动特性数值分析
Numerical Analysis on Vibration Characteristics of Track with Longitudinal Sleeper
寸冬冬 1曾京 1齐琳2
作者信息
- 1. 西南交通大学牵引动力国家重点实验室,成都 610031
- 2. 青岛捷适铁道技术有限公司,北京 100020
- 折叠
摘要
Abstract
To acquire the vibration characteristics of the track with longitudinal sleeper, supply reference for track structure parameters optimization, a longitudinal sleeper track model is established by using the FEM method. The vertical natural frequency and vibration mode of the longitudinal sleeper track system are studied, in which different damping material stiffness are selected. By applying the harmonic and random loads on the model respectively, the vibration transfer rules of longitudinal sleeper track structure are investigated. Results show that, the larger the damping material stiffness is, the bigger the structural natural frequency will be. The dominant frequencies of the structural dynamic response are consistent with the structural natural frequencies under both loading conditions. And the amplitude of harmonic response is greatly influenced by the damp of damping materials. Taking the damping-material stiffness as 20MN/m, through one-third octave frequency spectrum analysis, it is found that the acceleration level of bridge deck is lower than that of sleepers by 40 dB for the frequencies above 31.5 Hz. Therefore, the damping materials are very effective for the vibration reduction of longitudinal sleeper track system.关键词
纵向轨枕轨道/减振材料/刚度/阻尼/1/3倍频程谱Key words
track with longitudinal sleeper/ damping material/ stiffness/ damp/ one - third octave frequency spectrum
分类
交通工程引用本文复制引用
寸冬冬,曾京,齐琳..纵向轨枕轨道振动特性数值分析[J].铁道标准设计,2012,(8):8-11,15,5.
