Prediction analysis and experimental validation of vehicle inducedvibration and structure-borne noise of steel-concrete composite box girder of the high-ispeed railway

Abstract

To efficiently predict the vibration and structure-borne noise caused by steel-concrete composite box girder, based on the pseudo excitation method-symplectic method (PEM-SM), the track irregularity is regarded as the random excitation of stationarity, and the track structure is regarded as an infinite periodic substructure. The dynamic response of the track system is solved in the frequency domain. The composite model composed of finite element-boundary element (FE-BEM) and statistical energy analysis (SEA) model is established. Based on the acoustic vibration test results of a 32 m high-speed railway steel-concrete composite box girder, the effectiveness of the proposed method and prediction model is verified. The results show that the total vibration level and total sound pressure level of the bridge increase with the increase of train speed. The total vibration level and total sound pressure level of the web are greater than those of the flange plate and bottom plate, and the web is also the main sound radiation component.