International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 06 Issue: 10 | Oct 2019
p-ISSN: 2395-0072
www.irjet.net
DESIGN AND ANALYSIS OF RAIL DAMPING CHARACTER USING ABSORBERS Mr. Dr. S. RAMANA BABU M.Tech, Ph.D1, SETTI SREENIVASU M.Tech2 1Associate
Professor, Dept of Mechanical Engineering, S.V.P Engineering College, Visakhapatnam of Mechanical Engineering, S.V.P Engineering College, Visakhapatnam ----------------------------------------------------------------------------***-------------------------------------------------------------------------2Dept
ABSTRACT - The purpose of this thesis is to study the influence of design parameters on dynamic response of the railway track structure by implementing Finite Element Method (FEM). According to the complexity, different railway track systems have been simulated using rail absorber arrangement. Four types of rail absorbers and two types of without rail absorbers have taken into analysis. The finite element analysis is divided into two categories: eigenvalue analysis and dynamic analysis to find our resonance frequency. The Eigen frequencies and corresponding vibration modes were extracted from all the models. The main part of the finite element modeling involves dynamic analysis, in which resonance frequency were obtained and used as the criterion for evaluating the dynamic properties of track components. Keywords: viscoelastic damping, vibrations, arrangement of dampers and rail. Introduction
In recent decades, railway transport infrastructures have been regaining their importance due to their efficiency and environmentally friendly technologies. This has led to increasing train speeds, higher axle loads and more frequent train usage. These improved service provisions have however brought new challenges to traditional railway track engineering, especially to track geotechnical dynamics. These challenges demanded for a better understanding of the track dynamics. Due to the large cost and available load conditions limitation, experimental investigation is not always the best choice for the dynamic effect study of railway track structure. Comparatively speaking, an accurate mathematical modeling and numerical solution of the dynamic interaction of the track structural components reveals distinct advantage for understanding the response behavior of the track structure. Railway is seen as a means of environmental-friendly transportation by providing clean and efficient mass transit. However, noise and vibration problems due to railway operation become public, technical and administrative concern. The predominant source of noise from railway is associated with the rolling of the wheel on the rail. The roughness on the wheel and rail tread forms excitation and causes vibration of the wheel and track. When vibration propagates in the wheel and rail, the structure radiates noise. The aim of this thesis is to analyze the dynamic effects of the railway track. From the detailed finite element models created in ANSYS, more detailed information about the dynamic effects of the railway track can be made, such as rail track vibration modes and receptance functions. The results of the rail absorber system will be analyzed and suggestions will be made for the further study. Analysis is carried out for typical data obtained from Indian Railways. Analysis is carried out for only one side of the railway track. The rail cross-section is shown in Fig. 1 and parameters are shown in table below.
Fig 1:Rail section
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