一种新型支撑形式对钢弹簧浮置板轨道振动特性的影响  

Research on Effects of a New Supporting Form on Vibration Characteristics of Steel Spring Floating Slab Track

作　　者：高佳颖[1] 金浩[1] 刘维宁[2] 彭智勇[2] 

机构地区：[1]绍兴文理学院土木工程学院,绍兴312000 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《铁道标准设计》2015年第5期37-40,共4页Railway Standard Design

基　　金：国家自然科学基金项目(51008017)

摘　　要：在现有钢弹簧浮置板轨道支撑形式的基础上,提出一种全新的支撑形式。采用数值模态分析的方法,研究该种支撑形式对钢弹簧浮置板轨道振动特性的影响。分析结果表明:(1)在同等浮置板板长的条件下,本文提出的支撑形式,可以获得更低的1阶自振频率,但不改变高阶自振频率和振型;(2)浮置板板长的增加,对钢弹簧浮置板轨道的前3阶自振频率影响不大,丰富了钢弹簧浮置板轨道的高阶(弯曲)振型。本文提出的支撑形式,有利于提高钢弹簧浮置板轨道的减振能力。A new supporting form for the steel spring floating slab track is proposed in this paper based on present supporting forms. The effects of this supporting form on vibration characteristics of the steel spring floating slab track are analyzed with numerical model analysis method. The results show that： （ 1 ） The steel spring floating slab track supported by the new form style has lower 1 st order natural frequency than that of the present steel spring floating slab track with same lab length without changing high order natural frequencies and vibration mode. （2）Natural frequencies of first three orders are less affected by the slab length, and the high order （ bending） vibration mode of the steel spring floating slab track is enriched. Therefore, the supporting form proposed in this paper helps improve the ability to reduce vibration of the steel spring floating slab track.

关 键 词：支撑形式 钢弹簧浮置板轨道 模态分析 自振频率 振型 

分 类 号：U231[交通运输工程—道路与铁道工程]