Formulation of a rail vehicle model using Lagrange’s method requires the system’s kinetic energy, potential energy, spring potential energy, Rayleigh’s dissipation energy and generalized forces to be determined. This article presents a detailed analysis of generalized forces developed at wheel–rail contact point for 27 degrees of freedom–coupled vertical–lateral model of a rail vehicle formulated using Lagrange’s method and subjected to random track irregularities. The vertical–lateral ride comfort of the vehicle and the ride index of the vehicle are evaluated based on ISO 2631-1 comfort specifications and stability is determined using eigenvalue analysis. The parameters that constitute the generalized forces and critically influence ride and stability have been identified and their influences on the same have been analysed in this work.
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SharmaRC. Evaluation of passenger ride comfort of Indian rail and road vehicles with ISO 2631-1 standards: Part 1-Mathematical Modeling. Int J Veh Struct Syst2016; 8(1): 7–10.
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SharmaRC. Evaluation of passenger ride comfort of Indian rail and road vehicles with ISO 2631-1 standards: Part 2-Simulation. Int J Veh Struct Syst2016; 8(1): 1–6.
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SharmaSKSharmaRC. An investigation of a locomotive structural crash-worthiness using finite element simulation. SAE Int J Commer Veh2018; 11(4): 235–244.
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SharmaRCPalliSSharmaSK, et al.Modernization of railway track with composite sleepers. Int J Veh Struct Syst2017; 9(5): 321–329. DOI: 10.4273/ijvss.9.5.10.
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SharmaSKSharmaRC. Simulation of quarter-car model with magnetorheological dampers for ride quality improvement. Int J Veh Struct Syst2018; 10(3): 169–173. DOI: 10.4273/ijvss.10.3.03.
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SharmaRCSharmaSKPalliS. Rail Vehicle Modelling and Simulation using Lagrangian Method. Int J Veh Struct Syst2018; 10(3): 188–194. DOI: 10.4273/ijvss.10.3.07.
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PalliSKoonaRSharmaSK, et al.A Review on Dynamic Analysis of Rail Vehicle Coach. Int J Veh Struct Syst2018; 10(3): 204–211. DOI: 10.4273/ijvss.10.3.00.
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SharmaSKSainiUKumarA. Semi-active Control to Reduce Lateral Vibration of Passenger Rail Vehicle Using Disturbance Rejection and Continuous State Damper Controllers. J Vib Eng Technol2019; 7: 117–129. DOI: 10.1007/s42417-019-00088-2.
27.
SharmaS K. Multibody analysis of longitudinal train dynamics on the passenger ride performance due to brake application. Proceedings of the Institution of Mechanical Engineers Part K: J Multi-body Dynamics2019; 233: 266–279. DOI: 10.1177/1464419318788775.
28.
EN 14363:2005. Railway applications–testing for the acceptance of running characteristics of railway vehicles–testing of running behaviour and stationary tests.
