Assessment of the influence of the elastic properties of rail vehicle suspensions on safety, ride quality and track fatigue

作者：Suarez Berta^*; Manuel Mera Jose; Luisa Martinez Maria; Antonio Chover Jose

来源：Vehicle System Dynamics, 2013, 51(2): 280-300.

DOI：10.1080/00423114.2012.725852

• railway dynamics
• sensitivity analysis
• dynamic behaviour
• stiffness
• damping
• primary suspension
• secondary suspension
• safety
• track fatigue
• ride quality
• EN 14363 standard
• UIC 518 leaflet

A sensitivity analysis has been performed to assess the influence of the elastic properties of railway vehicle suspensions on the vehicle dynamic behaviour. To do this, 144 dynamic simulations were performed modifying, one at a time, the stiffness and damping coefficients, of the primary and secondary suspensions. 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 in future simulations without appreciably affecting the simulation results. In general terms, it was concluded that the highest influences were found for the longitudinal stiffness and the lateral stiffness of the primary suspension, and the lowest influences for the vertical stiffness and the vertical damping of the primary suspension, with the parameters of the secondary suspension showing intermediate influences between them.

• 出版日期2013-2-1