• Journal of the Korean Society for Railway
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• v.16 no.1
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• pp.14-19
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• 2013

Because excessive interior noise when riding a high-speed train leads to annoyances, fatigue and stress for passengers, interior noise reduction methods should be considered. In particular, a high-speed train operated in various operation environments, and in South Korea, these include open fields and tunnels. Therefore, a specific study about changes in interior noise characteristics according to different environments is necessary. For this reason, the interior noise characteristics on a KTX train and on the KTX-Sancheon train were analyzed from noise measurements using microphones in this paper. Vibrations on the axles, bogies and floor were also measured, are these area are structural paths for interior noise. From this research, the interior noise characteristics according to the driving speed were deduced and the effects on interior noise by driving environments such as open fields and tunnels were investigated. Furthermore, the effect on interior noise by axles, bogies and floor vibrations were analyzed from a transfer function analysis.

• Journal of Korean Society of Environmental Engineers
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• v.22 no.6
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• pp.1103-1111
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• 2000

With the rapid industrial development, a railway has become a main traffic means. But, rail traffic noise and vibration have become a major problem in urban area as well as a very serious issue in the living environment. Especially, noise and vibration induced by the rail operation have influenced on the residents' living nearby railway tracks. Nevertheless, adequate guidelines for the railway vibration are not yet established because of the lack of basic data and insufficient research works. In this point, the present study attempt to survey the effect and subjective response of railway vibration in urban area using questionnaire. This study also presents a basic data in establishing effective vibration plans for railway vibration in the future.

• Journal of the Korean Society for Railway
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• v.16 no.5
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• pp.358-364
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• 2013

In the second part of the paper, a design strategy for an apartment complex constructed at a railway depot is proposed for vibration reduction purposes. Various design parameters such as the vehicle operating speeds, artificial land behavior, housing support structure, and apartment sub-structures are individually examined to reduce the transmission of vibrations through building structures. Building construction on an artificial land should be subjected to regulations that require the application of a vibration reduction scheme based on the mechanics that govern the vibration transmission phenomena. The implementation of these parameters at an early design stage will provide a quiet living environment for residents who may be exposed to excessive noise and vibration.

• Journal of the Korean Society for Railway
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• v.12 no.4
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• pp.465-471
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• 2009

In this paper, a relationship between the noise and vibration of a high-speed train's wheelset is examined by using time-varying frequency analysis with random data analysis which together contributes to a reduction in the number of experimental running. The noise and vibration of the wheelset is mainly caused by an interaction between the wheel and railway which shows in non-stationary characteristics. For the analysis, they are measured by some microphones and accelerometers, and those signals are post-processed by time-varying frequency analysis with random data analysis. From the analysis, their methods are useful for analyzing the noise and vibration of high-speed train's wheelset.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11b
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• pp.33-33
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• 2005

• Journal of KSNVE
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• v.24 no.3
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• pp.39-42
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• 2014

• Journal of KSNVE
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• v.24 no.2
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• pp.27-31
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• 2014

• Journal of the Korean Society for Railway
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• v.11 no.6
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• pp.519-523
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• 2008

Inside noise levels of running train is the summation of air borne noise and structure-borne noise. In this paper, structure-borne noise, which is known to dominate inside noise level in open field, is investigated. Structure borne noise is analyzed in terms of vibration sources, transmission path and noise generating part so as to reduce inside noise levels.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.1123-1128
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• 2006

철도 및 도로교통에 의한 건축구조물의 진동, 소음을 저감시킬 수 없는 PO-MAT(Polyurethane Mat) 제품과 다양한 건축물의 진동, 소음이 전달되는 상황에 적용되어 방진효과를 정확하게 예측하는데 사용될 수 있는 설계안을 개발하였다. 개발된 제품은 다공질의 폴리우레탄 탄성체의 조직으로 도로 및 철도의 교통진동의 방진과 연구실, 기계실, 공조실 등의 Floating Floor System 및 건축기초의 내진용으로 사용되고, 실제구조물에 적용하여 진동저감과 충격흡수, 소음저감 효과가 탁월함을 확인하였다.

• Journal of the KSME
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• v.29 no.5
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• pp.464-468
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• 1989

환경측면에서의 소음. 진동은 교통기관(도로, 철도, 항공기 등), 공장, 건설공사 및 생활 등에 기 인하여 발생되는 것으로, 어떤 지역에서의 소음. 진동은 이들이 개별적 또는 복합적으로 합성된 양상을 띠고 있다 하겠다. 본고에서는 환경측면에서의 소음. 진동 저감을 위한 제도적 방안으로, 현행 환경보전법에 정한 기준과 더불어 공장의 소음. 진동 대책을 소개하고자 한다.