Noise prediction researches and modeling near by siauliai railway station

Abstract

Because of car traffics in roads, ecological and safety conditions worsening more and more transportation flows are shifting to railway transport. Inexplicable situation is in Lithuania. Increase of railway noise pollution is caused by development of rolling-stocks and increased speeds. That’s way more and more attention is distributed for investigation of noise pollution source, estimation of them, reduction, isolation and etc. [7]. This investigation takes place in Šiauliai railway station territory. Thought this station diesel freight and passenger trains are passing. For evaluation of noise pollution near the Siauliai train station there were selected 14 noise measurement points. Estimated that almost in all measurement points noise lever exceed permissible level from 1 till 19 dBA. Most of railway design and preparation works were made without estimation of potential noise pollution impact. That’s why installation of noise reduction tools is complicated by present territory built-up, limited space for noise reduction walls dislocation. Noise formation and propagation physical processes are complicated. That’s why selection of noise reduction tools and exact their impact evaluation could take long time. Using mathematical modelling programs these complicated physical and dynamical processes could be estimated faster. This allows test more different noise reduction wools installation variations. In this paper evaluation analysis of best noise reduction wall installation position is made using mathematical modeling program ,,CadnaA”.