同济大学学报（自然科学版）2012，Vol.40Issue(9)：1342-1348,7.DOI:10.3969/j.issn.0253-374x.2012.09.012
高架钢弹簧浮置板轨道减振特性分析
Vibration Reduction Characteristics of Steel Spring Floating Slab Track in Metro Viaduct
摘要
Abstract
The vibration reduction characteristics of steel spring floating slab track in metro viaduct were analyzed by the finite element method and field test in time domain and frequency domain respectively. The results show that the stiffness and distance span of the damper have a large influence on the top 10 order natural frequency distribution of floating slab, the variation of stiffness and distance span of damper control the vibration reduction effects of floating slab by changing the stiffness per unit length, the vibration level of roof, flange, web and the bottom plate of elevated girder decreased with 11-22 dB, 12-20 dB, 20-30 dB and 12- 21 dB respectively in the range of 25 - 100 Hz when slab is lifted, the vibration levels reduction increases as damper stiffness decreases and as the distance span increases, the stiffness and distance of steel spring almost have no effect on the displacement of elevated girder. The floating slab track has a certain reduction affection on wheel rail noise in the range of 63-2 000 Hz.关键词
高架轨道交通/浮置板/减振特性/有限元/现场实测Key words
metro viaduct/ floating slab track/ vibration reduction characteristics/ FEM/ field test分类
交通工程引用本文复制引用
韦红亮,练松良,周宇..高架钢弹簧浮置板轨道减振特性分析[J].同济大学学报（自然科学版）,2012,40(9):1342-1348,7.基金项目
国家自然科学基金(50878158,50908179) （50878158,50908179）
铁路环境振动与噪声教育部工程研究中心开放基金 （）
高等学校博士学科点专项科研基金(200802471003) （200802471003）
