Vertical bending vibration analysis of the car body of railway vehicle

Abstract

The paper features the analysis of the symmetrical vertical bending of the car body railway vehicle, when vehicle is running along on a track with vertical irregularities described in the form of the power spectral density (PSD). The analysis relies on the numerical simulations results, developed based on a rigid-flexible coupled vehicle model, with seven-degree freedom, where the car body is modelled as an Euler-Bernoulli type equivalent beam. The vibration behaviour of the car body is evaluated based on the PSD of the car body acceleration (PSD acceleration), calculated at the car body centre and above the bogies. The main characteristics of the car body bending vibration are pointed in correlation with velocity, the secondary suspension damping and the car body elasticity characteristics.