Title: Analyses of dynamic response of a railway bogie

Authors: Srihari Palli; Ramji Koona

Addresses: Department of Mechanical Engineering, Aditya Institute of Technology and Management, Tekkali, AP, 532201, India ' Department of Mechanical Engineering, Andhra University College of Engineering, Visakhapatnam, AP, 532003, India

Abstract: Dynamic behaviour of rail car body under operating conditions is a vital aspect for the railway coach maintenance department in identifying the effect of various surface and track irregularities. Harmonic and PSD response spectrum analyses of an Indian railway RCF bogie have been carried out using FE analysis in this paper. Major components of the RCF bogie are modelled using UNIGRAPHICSNX7.5 and have been translated into parasolid format, which is imported in ANSYS 12.1 finite element analysis package. Entire bogie is discretised using Solid92 tetrahedral elements. The primary and secondary suspension systems are modelled as Combination14 elements in ANSYS. Modal analysis is carried out to extract first few natural modes of vibration of the bogie. In harmonic analysis, sinusoidal excitation is fed as input to bottom wheel points to analyse the response of the bogie in terms of displacement at different salient locations. Vertical irregularities considered as a random function of time in the form of PSD have been given as base excitation input and the response spectrum analysis is carried out to identify the response in terms of PSD.

Keywords: railway bogies; harmonic analysis; power spectral density; PSD; dynamic response; FEA; finite element analysis; modelling; random function; vertical irregularities; frequency; ANSYS; railcar body dynamics; railways; railway coach maintenance; India; bogie vibration; vehicle vibration; track irregularities.

DOI: 10.1504/IJVNV.2015.070015

International Journal of Vehicle Noise and Vibration, 2015 Vol.11 No.2, pp.103 - 113

Received: 02 Aug 2014
Accepted: 09 Dec 2014
Published online: 24 Jun 2015 *

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