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

Authors

Linya Liu, Engineering Research Center of Railway Environment Vibration and Noise, Ministry of Education, East China Jiaotong University, Nanchang, China
Jialiang Qin, Engineering Research Center of Railway Environment Vibration and Noise, Ministry of Education, East China Jiaotong University, Nanchang, China
Quanmin Liu, Engineering Research Center of Railway Environment Vibration and Noise, Ministry of Education, East China Jiaotong University, Nanchang, China.
Jong-Dar Yau, Department of Architecture, Tamkang University, New Taipei City, Taiwan, R.O.C.Follow
Rui Song, Engineering Research Center of Railway Environment Vibration and Noise, Ministry of Education, East China Jiaotong University, Nanchang, China

Abstract

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 wheelrail vibration, from which the shifted dominant frequencies in spectral response are observed.

Recommended Citation

Liu, Linya; Qin, Jialiang; Liu, Quanmin; Yau, Jong-Dar; and Song, Rui (2019) "SPECTRAL ANALYSIS OF TRAIN-RAIL-BRIDGE COUPLING SYSTEM CONSIDERING FREQUENCY-DEPENDENT STIFFNESS OF RAIL FASTENING SYSTEMS," Journal of Marine Science and Technology: Vol. 27: Iss. 2, Article 4.
DOI: 10.6119/JMST.201904_27(2).0004
Available at: https://jmstt.ntou.edu.tw/journal/vol27/iss2/4