Sensitivity analysis to assess the influence of the inertial properties of railway vehicle bodies on the vehicle's dynamic behaviour

A sensitivity analysis has been performed to assess the influence of the inertial properties of railway vehicles on their dynamic behaviour. To do this, 216 dynamic simulations were performed modifying, one at a time, the masses, moments of inertia and heights of the centre of gravity of the carbody, the bogie and the wheelset. Three values were assigned to each parameter, corresponding to the percentiles 10, 50 and 90 of a data set stored in a database of railway vehicles. After processing the results of these simulations, the analysed parameters were sorted by increasing influence. It was also found which of these parameters could be estimated with a lesser degree of accuracy for future simulations without appreciably affecting the simulation results. In general terms, it was concluded that the most sensitive inertial properties are the mass and the vertical moment of inertia, and the least sensitive ones the longitudinal and lateral moments of inertia.

[1]  D J Thompson,et al.  Fundamentals of Rail Vehicle Dynamics: Guidance and Stability , 2004 .

[2]  Sebastian Stichel.  Limit Cycle Behaviour and Chaotic Motions of Two-Axle Freight Wagons with Friction Damping , 2002 .

[3]  Stefano Bruni,et al.  Effect of Suspension Parameter Uncertainty on the Dynamic Behaviour of Railway Vehicles , 2011 .

[4]  Rao V. Dukkipati,et al.  Impact Loads due to Wheel Flats and Shells , 1999 .

[5]  Berta Suarez,et al.  Influence of the track quality and of the properties of the wheel–rail rolling contact on vehicle dynamics , 2013 .

[6]  Simon Iwnicki,et al.  Simulation as a tool for assessing the match between track and vehicle standards , 2001 .

[7]  W Moore.  Safety in standards. , 1993, Health visitor.

[8]  Massimiliano Gobbi,et al.  Analytical formulae for the design of a railway vehicle suspension system , 2001 .

[9]  O Polach,et al.  On non-linear methods of bogie stability assessment using computer simulations , 2006 .

[10]  C. Esveld.  Modern railway track , 1989 .

[11]  S Stichel,et al.  On freight wagon dynamics and track deterioration , 1999 .

[12]  Roger Enblom,et al.  Two-level numerical optimization of ride comfort in railway vehicles , 2006 .

[13]  Mehdi Ahmadian,et al.  Effect of System Nonlinearities on Locomotive Bogie Hunting Stability , 1998 .

[14]  Yu. P. Boronenko,et al.  Influence of construction schemes and parameters of three-piece freight bogies on wagon stability, ride and curving qualities , 2006 .

[15]  Sebastian Stichel,et al.  Vehicle dynamics of a high-speed passenger car due to aerodynamics inside tunnels , 2007 .

[16]  Berta Suárez Esteban.  Metodología Analítica para el Estudio de Sensibilidades Aplicado a Modelos de Simulación Dinámica de Vehículos Ferroviarios, desde el Punto de Vista de la Seguridad, la Fatiga de Vía y la Calidad de Marcha , 2011 .

[17]  Jens C. O. Nielsen,et al.  Out-of-round railway wheels—wheel-rail contact forces and track response derived from field tests and numerical simulations , 2003 .

[18]  V K Garg,et al.  Dynamics of railway vehicle systems , 1984 .

[19]  Berta Suarez,et al.  Assessment of the influence of the elastic properties of rail vehicle suspensions on safety, ride quality and track fatigue , 2013 .

[20]  John McPhee,et al.  Optimization of curving performance of rail vehicles , 2005 .

[21]  R. V. Dukkipati,et al.  Idealized steady state interaction between railway vehicle and track , 1999 .

[22]  Simon Iwnicki,et al.  The Manchester Benchmarks for Rail Vehicle Simulation , 1998 .

[23]  Adrian Sandu,et al.  Modeling Multibody Systems with Uncertainties. Part I: Theoretical and Computational Aspects , 2006 .