Three-dimensional random vibrations of a high-speed-train-bridge time-varying system with track irregularities
Three-dimensional random vibrations of a high-speed-train-bridge time-varying system with track irregularities
Three-dimensional random vibrations of a high-speed-train-bridge time-varying system with track irregularities are studied in this paper. The rail irregularity is regarded as a random process. By extending the pseudo-excitation method, three kinds of rail irregularity are transformed into a pseudo load vector of the coupled system. A finite element model is used to describe the bridge and a spatial multi-body mass-spring-damping model is adopted to represent a moving railway car. Monte Carlo simulations are implemented to validate the presented method. A detailed case study on the train-bridge coupled system is conducted; it is focused on the effects of three kinds of rail irregularity on the stochastic characteristics of the dynamic responses of the system. The effect of randomness on the level of safety and the riding comfort created by the coupled system are also discussed. The results demonstrate that track irregularities may have a greater impact on the transverse response of the coupled system than on the vertical responses.
Dokumentinformationen
Three-dimensional random vibrations of a high-speed-train-bridge time-varying system with track irregularities
2016
Aufsatz (Zeitschrift)
Englisch