Vibration and Acoustic Analysis of a Railway Carbody Model with Independent Interior Structure

Abstract

The evaluation of passenger comfort and ride quality in railway vehicles is very important in railcar development. There are many studies to reduce vibration and noise inside the railway carbody. In order to reduce the vibration and noise inside the coach, a new structure that consists of an independent interior inside a body structure has been proposed. The new structure is modeled as the railway carbody with independent interior structure. In this paper, experiments are performed to compare with proposed structure and conventional structure using miniature carbody model. Vibration and acoustic characteristics of the structure are evaluated by the result of the experiment. The vibration and sound pressure level of the proposed structure whose inner shell is hung at side walls is found to be smaller than that of the conventional structure. In addition, vibration and acoustic analysis using finite element method is carried out. In order to compare the vibration characteristics of the proposed structure, simulation is performed by changing wire diameter of hangers.