A study on noise reduction in a gangway of a high-speed train

초록

The noise generated from inter-coaches and gangways in a high-speed trains have an effect on the interior noise, which gives displeasure and fatigue to passengers. Accordingly, the research on mitigation measures about the noise of inter-coaches and gangways was conducted in this paper. The gangway noise is mostly generated from air flow loops in a cavity in an inter-coach spacing, which is transmitted to an internal space in the gangway. Therefore, effective noise mitigation measures are to prevent the influx into the cavity and to increase transfer path losses between the gangway and the inter-coach spacing. In this research, air flow loops were simulated with a flow simulation program and the influx into the cavity was reduced by fairings. Also, bellows in the gangway were designed based on the transfer path analysis, and its noise mitigation measures were investigated from the results of a high-speed train. In this research, effective methods were examined for reducing noises in the between-car sections of a high-speed train.