SPECTRAL ANALYSIS OF TRAIN-RAIL-BRIDGE COUPLING SYSTEM CONSIDERING FREQUENCY-DEPENDENT STIFFNESS OF RAIL FASTENING SYSTEMS

被引：3
|
作者：
Liu, Linya [1 ]
Qin, Jialiang [1 ]
Liu, Quanmin [1 ]
Yau, Jong-Dar [2 ]
Song, Rui [1 ]
机构：
[1] East China Jiaotong Univ, Engn Res Ctr Railway Environm Vibrat & Noise, Minist Educ, Nanchang, Jiangxi, Peoples R China
[2] Tamkang Univ, Dept Architecture, New Taipei, Taiwan
来源：
JOURNAL OF MARINE SCIENCE AND TECHNOLOGY-TAIWAN | 2019年 / 27卷 / 02期
基金：
中国国家自然科学基金;
关键词：
dynamic flexibility method; frequency-dependent stiffness; rail fastening system; rail-pad; train-rail-bridge system;
D O I：
10.6119/JMST.201904_27(2).0004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A rubber rail-pad is typically inserted between the rail and the sleeper to attenuate wheel/rail vibrations for conventional train-rail-bridge (TRB) system. For mathematical modeling, a rail-fastener with rubber pad is simplified as a spring-dashpot unit, whose spring stiffness is related to the exciting frequency of external loads. To exhibit such characteristics of rail-pads on TRB dynamics, based on dynamic flexibility method, two computational models of constant/frequency-dependent stiffness (FDS) are considered for comparison. Numerical studies reveal that the FDS model provides a strengthening benefit for the wheel rail vibration, from which the shifted dominant frequencies in spectral response are observed.
引用
收藏
页码：114 / 122
页数：9
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