• Proceedings of the KSR Conference
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• 2011.05a
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• pp.1236-1241
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• 2011

Railway bridge is the most problematic thing in the railway is due to noise and vibration. To solve these problems, there have been studies. However, a fundamental alternative to the noise and vibration. It has not so far not shown, and to minimize the problem is focused. As a result, developed a lot of noise reduction measures, but the vibration is not much for reduction. In this study, to support the superstructure of the bridge vibration possible for spherical elastomeric bearing is a technical review. And it applies to the railway bridge, the numerical analysis was carried out.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.908-912
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• 2008

Structure-borne noise is known to dominate internal running noise levels in open field. In this paper vibration isolation characteristics of floors are investigated to see their effect on the internal running noise. By using the analysis and test results of test specimen of small size, internal running noise level of complete train is estimated. Analysis results show that soft rubber as a vibration isolator has the most favorable effect on the inside running noise.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.119-120
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• 2014

This study presents an development of impact damper and its application to reduction of railway vibration from moving roads. The impact damper for reducing trnsverse vibration from moving loads were designed and verified using simple dynamic model. To verify the performance of the impact damper, the vibration of a simplified beam with the impact damper was measured. The performance on reducing vibration for different clearance and mass ratio of the damper was investigated. The numerical solutions were verified using the experimental results from a simplified beam. The result can be utilized to reduce the rolling noise from high-speed trains.

• Journal of the Korean Society for Railway
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• v.16 no.5
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• pp.353-357
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• 2013

Property development along railway lines is a critical issue at present. Because various railway lines exist in most large cities, there are numerous properties and open spaces to be developed for communities associated with these lines. The active development of railway properties can be a means to resolve housing shortage problems in cities. In this first part of this paper, noise and vibration levels of an artificial area of land and apartment complex are measured and evaluated to derive a design strategy for vibration reduction purposes.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.974-978
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• 2006

To improve the riding comfort and to increase the speed of high-speed railway, it needs active suspension system for railway more and more. In Korea, Korean Train Express (KTX) was opened to commercial traffic 2years ago. Korea High-speed Railway (HSR 350x) is being developed and succeeded 350km/h test run. With the increase of the speed, the vibration control of the high-speed railway becomes important to meet high ride quality. In this paper, we suggest the install of lateral damper to HSR 350x. The result shows better ride quality.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.23 no.11
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• pp.1020-1026
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• 2013

An accurate railway environmental noise prediction model is required to make the proper solution of the railway noise problems. In this paper, an engineering model for predicting the noise of conventional passenger cars is presented considering the acoustic source strength in octave-band frequencies and the propagation over grounds with varying surface properties. Since the formation of a train can be variable, the source strength of each locomotive and passenger car was estimated by measuring the pass-by noise and analysing the wheel-rail rolling noise. Some validation cases show on the average small differences between the predictions of the present model and the measurement results.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2008.04a
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• pp.500-504
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• 2008

Residents in an area where both trains and cars pass through are exposed to not only road traffic noise but also railway noise. Nevertheless, the degree of annoyance the caused to the residents is being under evaluated as the noises have been evaluated separately. Therefore, this study aimed at evaluating the integrated noise of road traffic and railway, and proving the accuracy of the evaluation result.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.05a
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• pp.366-371
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• 2004

For the reduction and efficient management of railway noise, first of all prediction of railway noise is necessarily requisted. At home and abroad many studies for prediction of raiiway nearby noise have been accomplished. But it is impossible to predict easily and exactly for the Korean Railway, because the acoustic powers for each rolling stock operated in Korea have not been built yet. So in this study, prediction model equation for environmental noise for Korean rolling stock Mugungwha was suggested using SEL of engine and rolling noise component separately. In this prediction model, the number of car, distance from the rail can be considered. Finally for the validation of prediction nlodel equation, the predicted Leq was compared to the measured Leq.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.18 no.7
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• pp.741-745
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• 2008

Residents in an area where both trains and cars pass through are exposed to not only road traffic noise but also railway noise. Nevertheless, the degree of annoyance the caused to the residents is being under evaluated as the noises have been evaluated separately. Therefore, this study aimed at evaluating the integrated noise of road traffic and railway, and proving the accuracy of the evaluation result.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.10a
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• pp.564-569
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• 2013

An accurate railway environmental noise prediction model is required to make the proper solution of the railway noise problems. In this paper, an engineering model for predicting the noise of conventional passenger cars is presented considering the acoustic source strength in octave-band frequencies and the propagation over grounds with varying surface properties. Since the formation of a train can be variable, the source strength of each locomotive and passenger car was estimated by measuring the pass-by noise and analysing the wheel-rail rolling noise. Some validation cases show on the average small differences between the predictions of the present model and the measurement results.