Impact of electric locomotive traction of the passenger vehicle Ride quality in longitudinal train dynamics in the context of Indian railways

Abstract

Rail transport is one of the major modes of transportation in India. The dynamic performance of a railway vehicle, in terms of serviceability and safety, was evaluated on the basis of specific performance indices such as ride quality and comfort. This paper is an attempt to analyse the longitudinal dynamic model of the passenger train for the attainment of better vehicle ride quality and comfort. The modelling has been done in two phases: in the first phase, a mathematical model was analysed which was further used for the evaluation of the longitudinal dynamic forces that appear on the buffer, draw gear and fastening devices during the braking process. The second phase includes simulation of longitudinal train dynamics considering the effects of forces like rolling resistance, brake force, coupler force and the gravitational force acting externally on a vehicle for better ride quality and comfort in comparison to the traction effect on WAP-5 and WAP-7 Indian locomotives. The Sperling ride index and ISO 2631 were used respectively to calculate the ride quality and comfort using filtered RMS accelerations. Simulation results revealed that WAP-5 was better at an initial speed of 30 km.h −1 and 45 km.h −1 , whereas, the WAP-7 gave better ride quality and comfort than WAP-5 at and above the speed of 60 km.h −1 .

Parametric Optimization and Experimental Validation for Nonlinear Characteristics of Passenger Car Suspension System

“…are the uncertain parameters. The precise estimation of the road surface is the prerequisite in vehicle design analysis (Sharma and Kumar, 2017a;2017b). There are many possible ways to characterize the road profile as vehicle excitation input.…”

Sensitivity analysis of three-wheel vehicle’s suspension parameters influencing ride behavior

“…20 In this analysis, principal frequency weightings with multiplication factors specified in ISO 2631-1 standards are applied to RMS acceleration values to obtain frequency-weighted acceleration for evaluation of passenger comfort in the sitting position. [21][22][23][24][25][26][27][28] The three-wheel vehicle with independent suspension is considered for this analysis. The values of the parameters of the same are mentioned in Table 2.…”

Analysis of generalized force and its influence on ride and stability of railway vehicle

“…[10][11][12] The influence of parameters such as locomotive traction on vehicle ride considering longitudinal dynamics has also been investigated. 13 The influence of geometric or inertial parameters on ride comfort has not been investigated to that extent. It has been investigated from the analysis that for a given gauge and wheel profile, increasing axle load has a positive influence on stability, especially at the higher amplitudes.…”