• 제목/요약/키워드: urban vibration

검색결과 363건 처리시간 0.03초

정온한 도시환경을 위한 소음지도 개발 및 응용연구 (A study on the Development of Noise map for quiet environment of urban areas)

  • 박상규;박인선
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2003년도 춘계학술대회논문집
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    • pp.1182-1186
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    • 2003
  • Noise map is becoming an increasingly important tool supporting noise policy. In order to main am a quiet environment of urban areas, noise map was developed by using GIS technique which combines geographic and noise informations with a database management system. By evaluating various methods of the spatial anal: sis, it was concluded that the inverse distance weighted method gave the best results and was applied to develope the noise maps of road noise.

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도시철도용 구동기어의 설계 요소에 대한 소음 기여도 분석 (Noise Source Identification of the Design Elements of the Driving Gear for the Urban Railway)

  • 김기남;이현철;선찬웅;이성욱
    • 한국소음진동공학회논문집
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    • 제25권7호
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    • pp.470-480
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    • 2015
  • As the railway noise guideline of the Ministry of Environment after 2017 is strictly enforced, the noise level at stationary condition of urban railway is demanding the reduction about 2 dB(A). And the noise level at running condition is reduced by 6 dB(A) at 80 km/h. Therefore, the devices that causes noise shall arrange for the improvement plan of noise reduction for each device. In this paper, we carried out a technical review of the driving gear used to drive the vehicle from a variety of noise-induced equipment of a urban railway. Analyze the causes of the current noise levels and noise cause about the driving gear used in current urban railway and this study analyzes the noise level and noise cause the drive gear being used in the current urban railway. Finally, in this paper proposes a scheme for reducing the noise that can be designed to reduce the noise with considering the noise cause analysis.

쾌적환경 조성을 위한 도시 환경음의 주관반응 평가 II -주관반응평가 방법의 비교를 통하여- (Evaluation of Subjective Responses for Urban Environmental Sounds to Create Comfortable Environment -through the comparison of subjective evaluation-)

  • 박현구;김항;신용규;기노갑;김선우;장길수
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 춘계학술대회논문집
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    • pp.734-737
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    • 2006
  • For the comfortable housing life, an urban environment should give comfort and pleasantness to people living in house and in city. There are lots of environmental conditions in city affecting house and life and most of all the noise pollution have been become factor that makes people's life hard without need to say. Recently researches have been performed to create comfortable urban environment and a study on the evaluation of urban environmental sounds is now undergoing. This study aimed to analyse the subjective characteristics through the subjective evaluation to the sounds measured with physical parameters and eventually to find out evaluation method for urban environmental sounds. Vocabularies applied to previous studies were used for the subjective evaluation and sound sources recorded in specific places were presented with picture at the same time.

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전동차 현가구조에 따른 동적거동특성 분석 (Analysis on the Dynamic Behavior according to Suspension Structure of the Urban Railway Vehicle)

  • 허현무;노학락
    • 한국산학기술학회논문지
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    • 제21권11호
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    • pp.617-623
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    • 2020
  • 다수의 승객을 운송하는 도시철도 전동차는 도시 철도교통시스템의 핵심이다. 따라서 차량의 동적성능이 확보가 차량 안전 확보 및 승객서비스 차원에서 선행되어야 한다. 철도차량의 진동, 승차감과 같은 동적거동은 현가시스템 구조 및 현가요소에 따라 크게 영향을 받는다. 철도차량의 현가시스템은 윤축과 대차간 1차현가시스템, 대차와 차체간 2차현가시스템으로 구성되어 있다. 본 논문에서는 국내에서 운용되고 있는 전동차 현가구조에 따른 전동차의 동적거동에 대하여 분석하고자 한다. 현가구조가 상이한 2종류의 전동차에 대하여 실제 선로에서 동일 주행조건으로 주행시험을 수행하였으며 차량의 진동을 계측하였고 진동과 승차감, 진동감쇠율과 같은 동적거동 특성을 분석하였다. 시험결과, 차체 진동성능은 좌우방향은 B대차가, 상하방향은 A대차가 상대적으로 우수하게 나타났다. 승차감은 전반적으로 A대차가 B대차에 비하여 우수하게 나타났다. 진동감쇠율을 보면, 1차현가시스템은 고무스프링이 적용된 A대차에 비하여 코일스프링이 적용된 B대차의 진동감쇠 성능이 우수하며 2차현가시스템은 코일스프링에 비하여 공기스프링이 적용된 A대차의 진동감쇠 성능이 우수하다. 본 논문의 결과는 향후 철도차량 신차 설계 과정에서 현가구조 설계 및 현가요소 선정 시, 유용한 자료로 활용될 것이라 기대된다.

터널굴착이 지상구조물에 미치는 영향평가 및 발파지침설계 (Ground Vibration in Tunnelling by Blasting and its Effect on Surface Structures)

  • 신희순;한공창;류창하;신중호;박연준;최영학
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2000년도 가을 학술발표회 논문집
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    • pp.463-470
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    • 2000
  • In tunnel excavation by blast beneath the surface structures in urban area, the characteristics of ground vibration induced by blast and its influence on surface structures are analyzed by the field test and the numerical analysis on dynamic behaviors of the structure. According to the field test on the propagating characteristics of blast vibration through the rock mass and the concrete foundation pile. the attenuation index of peak particle velocity with distance shows the range of 1.7∼2.0 for the rock mass and the range of 2.0∼2.3 for the concrete pile. This shows that the blast vibration reduces more rapidly in the concrete pile. It is known from the numerical analysis on dynamic behavior of the structure that the coefficient of response, velocity ratio of structure response to input wave, is different according to the story of the structure. It can be said from this research that the characteristics of the ground vibration and the dynamic behavior of the structure should be well evaluated and be considered as important factors for safe blasting design especially in underground excavation at shallow depth in urban area.

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도시철도 지반진동 예측식 개선에 관한 연구 (Study on the Improvement of Empirical Formula for Prediction of Ground Vibration Induced by Urban Rapid Transit)

  • 신한철;조선규;양신추
    • 한국철도학회논문집
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    • 제12권3호
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    • pp.357-363
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    • 2009
  • 본 논문에서는 도시철도 운행으로 발생하는 지반진동의 예측을 위하여 서울지하철 현장 계측을 실시하였다. 현장 계측 결과와 뉴욕지하철의 예측식과 동경지하철의 예측식으로 산정된 값과 비교한 결과, 국내 지반의 지반진동레벨은 뉴욕지하철의 예측식보다 크게 산정되었으며, 동경지하철의 예측식보다는 다소 작게 산정되었다. 또한, 계측현장 지반의 전파경로에 따라 토사지반과 암반지반으로 구분하여 국내 지반특성에 적합한 지반진동 예측식을 제안하였다.