Random Vibrations of Railway Vehicles

Abstract

Methods for a solution of direct and inverse problems of statistical dynamics of railway vehicles are considered. Characteristics of computational schemes, modelling a mechanical system “vehicle-track” are given. According to the analysis purposes computational schemes for vehicles are presented in the form of linear or nonlinear composite mechanical systems, affected by stationary or nonstationary random excitation. Methods for the definition of system response statistical characteristics: displacements, velocities, accelerations, stresses are stated. Particular attention is given to the solution of inverse problems. Algorithms for establishing the model parameters of random kinematic disturbances, the track and pseudo-sliding forces are developed from the field test results. Methods of functional, parametric (and sometimes structural) identification of linear and some nonlinear mechanical systems are described. As an example the results of the investigation of random vibrations and railway vehicle parameter identifications are presented.