Research On Optimizing Of Noise Barrier Of The Railway Using Ray-tracing Method

With the sixth large areas rising speed in high-speed of railway in our country and the using EMUs, china has entered into high-speed railway times. As the speed rising, noise control is faced with tremendous pressure. At the present time, noise barrier is a extensive and effective measure of noise controlling. But, noise evaluation and noise prediction are always the pivotal technical problems on application Engineering.In this paper, the contribution of each source of the passenger transport lines noise is presented through the long-term research on it and lots of other data both domestic and abroad. The contribution also provides parameters for the following numerical simulation for the insertion loss of the noise barrier. The model of jingjiurailway of wuhan dadongmen and noise barrier is created using the software Raynoise. Reflective noise barrier insertion loss, and the simulation of the sound barrier the value of the field measurement data and comparative analysis, to verify the correctness of the model to solve a large-scale projection of the sound field.Based on the use of numerical simulation methods of the railway further acoustic sound barrier to a high degree of optimization, and the current widely used in engineering structures of several forms of noise barrier insertion loss down to forecasting, analyze the noise characteristics of different structural forms of noise barrier insertion loss simulation value, so as to arrive at the different protected areas which form the structure of the sound barrier and economic aspects of practical conclusions. Finally, sound-absorbing material of the sound barrier in the application and a reasonable layout, come up with a reasonable layout of the program sound-absorbing material.Based on the analyse and conclusion in front, the penman point out the acoustic design of the optimizing of noise barrier.