Vibration Analyze of High Speed Train Carriage During Special Running Condition

High-speed trains are subjected to random excitation and vibration due to the track environment, airflow influence, weather changes, etc. Such vibration has different degrees of influence on the train’s operation safety, operation quality and the comfort of the people inside. In order to analyze the generation mechanism of such vibration, study its vibration characteristics for targeted vibration damping design. In this paper, several special sections of high-speed train with the most obvious vibration are studied and tested. The vibration signals of the carriages are collected by arranging vibration acceleration sensors, and the vibration characteristics of the sampled carriages are analyzed by using time-frequency transform, after that the samples are categorized based on the types of the special sections and the excitation factors to build the time frequency characteristics of the vibration in high-speed train carriages. The samples are categorized and summarized based on the types of special road sections and excitation factors to build a sample set of vibration time-frequency characteristics about high-speed train carriages in special road sections.