Vibration analysis of high-speed rail system using the moving element method

Abstract

The paper proposes to extend the modeling of the rolling vibration to that of the impact vibration caused by discrete irregularities on wheels and / or rail. It presents a time domain formulation of the vertical interaction between the wheel and the rail, for the prediction of the impact vibrations. The problem of interaction wheel / rail is solved by the moving element method. The input data of the interaction model, the contact model wheel / rail and vibrational pattern of the wheel are firstly formulated. It allows the definition of a relative vertical movement between the wheel and the rail, called relative roughness. The proposed computational scheme is applied to investigate the dynamic response of high-speed rail system. A parametric study is carried out function of the main influential parameters mainly the traveling train speed and the severity of track irregularity. The results of numerical simulations show the efficiency of the proposed method and its main advantage for the analysis of the generated vibrations.