Dynamics Simulation of Metro Vehicles Based on DAP-Rail and Analysis of Influencing Factors
For the purpose of this project,a dynamic on-track type test was conducted on a B-type metro vehicle,a nonlinear dynamic model of the trailer was developed,and a numerical simulation was conducted using DAP-Rail rail vehicle dynamic simulation software.By comparing the simulation results with the test results,the simulation model is verified,and the effects of the wheel-rail friction coefficient,track irregularity wavelength,the geometry calculation method of wheel-rail contact,wheel-rail creep model,and track model on the conventional dynamic performance of vehicles are analyzed.The results indicate that the wheel-rail friction coefficient and track irregularity wavelength exert a significant impact on the dynamic performance.It can be improved by appropriately reducing the friction coefficient,and limiting the track irregularity wavelength range to less than 10 meters can be advantageous in reducing the running stability index;In order to ensure calculation efficiency and accuracy,the wheel-rail relationship is computed through interpolation of the number table,and the equivalent mass model of the rail is used to calculate the creep-slip force of the wheel-rail through the FASTSIM or SHEN model during the conventional dynamic optimization of metro vehicles,which can meet the analytical requirements.The dynamics of metro vehicles are influenced by numerous variables,and it is crucial to establish a reliable database and uniform specifications for the measured track irregularities,wheel-rail contours and spatial parameters of the track.
metro vehicledynamics performanceon-track testnumerical simulation
万方数据
维普
