连续型浮置板轨道模态设计方法  

Modal Design Method of Continuous Floating Slab Track

作　　者：李忠继[1] 林红松[1] 黄慧超[2] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]西南交通大学,成都610031

出　　处：《高速铁路技术》2017年第6期21-23,44,共4页High Speed Railway Technology

基　　金：四川省科技计划项目(2016HH0041);中国中铁股份有限公司科技开发计划项目(2016-重点-37)

摘　　要：针对传统浮置板轨道固有频率计算方法在计算连续型浮置板轨道时的局限性,文章开展了连续型浮置板轨道模态设计的方法研究。利用线性振动理论推导了连续型浮置板轨道固有频率计算公式,并通过实际算例对比,阐释了本文提出的计算方法与传统方法的区别。最后利用有限元法,验证了该方法的准确性。结果显示:对于20 m长的浮置板轨道,本文提出的计算方法与有限元法的绝对误差仅为0.04 Hz,远小于传统方法与有限元法的误差(0.49 Hz),大幅提高了模态频率设计的精度。Aiming at the limitation of the calculation method of natural frequency of traditional floating slab track in calculating the continuous floating slab track,in this paper,a modal design method for continuous floating slab track is developed.The formula of the natural frequency of the continuous floating slab is deduced by the linear vibration theory.The difference between the proposed design method and the traditional method is explained by the practical calculation example.Finally,the finite element method is used to verify the accuracy of the method.The results show that the absolute error of proposed method is 0.04 Hz respect to the finite element method,the traditional method absolute error is 0.49 Hz.The proposed method greatly improves the accuracy of the modal frequency design.

关 键 词：浮置板轨道 模态分析 固有频率 

分 类 号：U213.21[交通运输工程—道路与铁道工程]