Numerical Sensitivity Analysis of Natural Frequency to Structural Parameters of Traditional Railway Tracks

Jabbar Ali Zakeri¹ Hassan Ziari² Sayed Mahdi Sharifi Moghaddam Kakhki³ Reza Bakhtiyari⁴

1) Faculty member, School of Railway Engineering, Iran University of science and Technology, P.O. Box 16846, Tehran, Iran, E-mail:
2) Faculty member, School of civil Engineering, Iran University of science and Technology, P.O. Box 16846, Tehran, Iran, E-mail:
3) Ph.D. candidate, School of civil Engineering, Iran University of science and Technology, P.O. Box 16846, Tehran, Iran, E-mail:
4) Ph.D. candidate, Islamic Azad University, Science and Research Branch, Tehran, Iran, E-mail:

Publication : 7th International Conference on Civil, Architectural and Environmental Sciences - Berlin(berlin-conf.com)
Abstract :
One of the important negative effects of railway lines on the surrounding environment is the vibration emission. These vibrations are propagated in the surrounding environment of the track in the ground and air and vibrate every substance they reach. Ground vibrations increase significantly by increasing the operating speeds of trains. Determining the natural frequency of the track and the factors affecting it is one of the initial steps of analyzing the dynamic behavior of the track and providing solutions to reduce the vibration emission of the track in the surrounding environment. In this study, a numerical model has been developed for predicting the natural frequency of the track and investigating the effect of influencing factors. For this purpose, for a ballasted track, the rail has modelled as a beam on non-continuous supports. Mass and stiffness matrixes have been created and natural frequencies have been estimated by solving characteristic equations. Finally, according to the type of the selected support, by changing the mass and stiffness of track components, the sensitivity analysis on the natural frequencies has been performed to investigate and compare their effect on the natural frequency of the track and the results has reported.
Keywords : Dynamic analysis natural frequency of the structure sensitivity analysis ballasted track non-continuous support