초록

고속철도 차량의 연구 수행된 소음원 및 단일 차량에 대한 해석 결과를 바탕으로 하여 실제 차량 편성에 대한 실내외 환경소음의 예측을 수행하였다. 이를 통하여 차량 주행 조건에 따른 다양한 경우의 소음 발생 및 분포를 예측하고 검증 보완하며 이에 따른 소음 저감 방안을 제시하였다. 또한 실차에 적용되는 각종 차음재 및 구조의 특성에 대한 예측 및 실제 실험결과와의 비교를 통하여 실내소음 저감 방안에 대하여 모색하고 향후 시제차량 제작 후 실제 소음 측정 및 검증 실험에 대한 검토 자료를 확보 하였다.

Abstract ▼

Objective
This research studies the effects of community noise around railway, noise from the inside/outside noise of the High-Speed EMU. Using the program which predicts the noise, analysis will be performed by modeling, simulation and examination of the results. Also, this research will provide

Objective
This research studies the effects of community noise around railway, noise from the inside/outside noise of the High-Speed EMU. Using the program which predicts the noise, analysis will be performed by modeling, simulation and examination of the results. Also, this research will provide the preventive method for noise reduction. The aim of this study is to compare and contrast the results before and after the prevention of noise and reflect them in the design as well.
Task
(1) Research on the noise source.
The new wheel/rail noise source should be considered because train's structural transformation could be expected easily. Likewise the noise of power sources has to be considered by the position of installation of the scattered motors. Especially, the aero dynamic noise would be increased rapidly if the vehicle runs over 370 km/h.
The method of modeling noise prediction would be studied convergently, including the research about the frequency property, velocity dependence, sound pressure of noise source.
(2) Research on the Sound Transmission Loss
An exclusive program which could analyze the loss of the sound transmission from the floor, the sides(mirror), insulator in High-Speed EMU should be developed.
(3) Research on the Train inside/outside and Prediction for Community Noise
In order to predict the noise when the High-Speed train is running at the outside and in the tunnels, the result of the research would be derived by evaluating the effect of the noise on the upper/middle parts of the carriage and around the railway using the program.
(4) Noise Reduction
The previous vehicle design could be a problem when the noise which the train makes over 370 km/h is generated. In each Noise Reduction, the results have to be derived to explain the effect of reduction. After all the comparison of the results, the more realistic way which is applicable should be suggested.
(5) High-Speed Train noise prediction and Code development by MATLAB
The outcome of the research will be made with the code by MATLAB. And the prediction code has to be developed to show the noise on the upper/middle parts of the carriage.
Output
- Through predicting the effects of noise affects inside/ outside of the vehicle and community noise of the train while designing for vehicle, the establishment of the technology for developing the silent and desired train would be possible.
- By estimating the efficiency of the main insulator in the designing process, the competitiveness of the design for insulator can be promoted.
- It's possible to obtain the technology that could investigate and analyze the noise reduction and output the effect of the noise reduction.