ITX와 경춘열차의 실내 소음 특성 비교

안용찬(Yong-Chan Ann),안진호(Jin-Ho Ann),이중혁(Jung-Hyeok Lee),김석현(Seock-Hyun Kim) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5

최근 경춘선 복선 전철이 개통되면서 승객이 비약적으로 증가하고 지역 상권이 크게 활성화되고 있다. 특히 준고속 열차인 ITX-청춘 열차는 안전성, 운행의 정시성 및 승차감 측면에서 다른 교통수단 대비 철도 운송의 경쟁력을 크게 높이고 있다. 그러나 경춘선 일반 전동열차의 경우, 주행 시의 실내소음, 특히 터널 구간의 소음에 대해서 승객들이 큰 불만을 제기하고 있다. 본 연구에서는 경춘선 일반 전동열차와 준고속 열차인 ITX-청춘 열차를 대상으로 실내소음 특성을 실험적으로 비교한다. 운전 상태에서 개활지 및 터널, 교량에서의 실내소음을 측정하여 주파수특성 및 음질 지수를 비교한다. 연구결과를 통하여 향후 일반 전동 열차의 소음대책을 위한 정보를 제공하고자 한다. Recently, as double track opens for Gyeongchun electric train, the number of passengers has been dramatically increased and local market has been activated. Especially, intercity express train (ITX) makes railway transportation more competitive than other transportation ways in aspect of safety, ride comfort and punctuality. However, in case of Gyeongchun general electric trains, many passengers complaints about the interior noise, especially noise in tunnels. In this study, interior noise characteristics of ITX and Gyeongchun general train are measured and compared. Frequency characteristics and sound quality of the interior noise in tunnels, on open land and bridge are analyzed and compared under real operation. The aim of the study is to provide useful information to improve the interior noise characteristics.

경춘 전동열차의 실내 소음 특성

안용찬(Yong-Chan Ann),김석현(Seock-Hyun Kim),안진호(Jin-ho Ann),이중혁(Jung-Hyeok Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5

Recently, with the opening of the double track in the Gyeongchun electric train, the number of passengers has been dramatically increased and local market has been activated. Especially, intercity express train(ITX) makes railway transportation more competitive than other transportation ways in aspect of safety, ride comfort and punctuality. However, in case of the Gyeongchun general electric trains, many passengers complaints about the interior noise, especially noise in tunnels. In this study, interior noise characteristics of ITX and Gyeongchun general train are measured and compared. Frequency characteristics and sound quality parameters of the interior moise in tunnels, on open land and bridge are analyzed and compared under real operation. This study will provide useful information for improving the interior noise characteristics.

경춘선 전동열차의 실내 소음 특성

안용찬(Yong Chan Ann),이중혁(Jung Hyeok Lee),김석현(Seock Hyun Kim) 대한기계학회 2014 大韓機械學會論文集A Vol.38 No.7

경춘 복선의 일반 전동열차와 준 고속 열차인 ITX-청춘이 개통된 이래, 서울과 춘천을 오가는 유동인구가 급증하고 있다. 이는 대용량성과 저렴한 요금, 운행의 정시성 및 안전성 측면에서 다른 교통수단에 비해 철도 운송의 경쟁력이 높기 때문이다. 그러나 실내소음 측면에서는 전동 열차에 대한 승객들의 불만이 상당하다. 특히 터널 구간에서 실내소음은 급격히 높아져 대화에도 지장을 줄 정도이다. 본 연구에서는 경춘선 일반 전동 열차와 ITX-청춘 열차를 대상으로 정상 주행 중의 실내소음 특성을 비교 분석한다. 개활지, 터널 및 교량에서의 소음 레벨, 주파수 특성과 음질 지수를 분석하고, 실내 위치에 따른 소음레벨의 차이를 비교하여 소음의 전달 경로를 파악함으로써 향후 전동 열차의 실내소음 향상을 위한 기초 정보를 제공하고자 한다. Since the opening of the double-track railway for the Gyeongchun local electric train and the semi-high speed train ITX, floating population between Seoul and Chuncheon has rapidly increased. This is attributable to the competitiveness of the railway service in terms of punctuality and safety of operation, mass transportation and low fare. However, many passengers have expressed strong dissatisfaction and displeasure towards the interior noise and its high rate of increase, particularly in tunnel sections. In this study, the interior noise characteristics of Gyeongchun local electric train and ITX were analyzed and compared. Noise levels, frequency spectrum and sound quality indices were compared for the open land, tunnel and bridge. Finally, from the noise levels depending on the location in the vehicle compartment, the noise transmission path was determined and a basic strategy for reducing the interior noise was developed.

지하철 진동에 의한 구조음 실측치와 예측치 비교

이태호(Tae-Ho Lee),안용찬(Yong-Chan Ann),조정식(Jung-Sik Cho),이기륭(Ki-Ryung Lee) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10

지하철 인근 지역에서 차량 통과 시 차륜과 레일의 상호작용으로 인한 진동이 지반을 통하여 건물까지 전파되어 구조전달음이 발생하게 된다. 이러한 구조전달음이 발생하는 지하철 인근 지역에서 도로나 주거단지가 새롭게 조성될 예정인 경우, 완공 이후에 발생하는 구조전달음 영향을 사전에 평가하고 대책을 수립하는 것이 요구된다. 본 논문에서는 국내에 위치한 일부 역사에서의 구조전달음을 측정하고 국외의 예측식을 검토하여 구조전달음의 실측치와 예측치를 비교한다. 따라서 국내 지하철의 구조전달음 예측에 대하여 국외 예측식의 타당성을 검토함으로써 향후 건설될 지하구간 역사의 인근 주거지역에 대한 구조전달음을 예측하는데 기초 자료로 활용하고자 한다.

인버터형 냉각탑의 구조진동 절연효과에 관한 연구

이태호(Tae-Ho Lee),안용찬(Yong-Chan Ann),김정인(Jung-In Kim) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10

Cooling tower is essential air conditioning equipment for discharging to the atmosphere to absorb energy from the chiller. Lately, there are a lot of instances that drive in inverter form of automatic control system so that can change the cooling tower rotational speed according to cooling load condition of building inside. This method is economical to be able to save energy. But, rotational speed of cooling tower can be match the building floor natural frequency because of extensive rotational speed. Specially, a large cooling load is required, buildings such as data center happens occasion that can not avoid resonance phenomenon because of low fan speed. This research confirmed effect of vibration isolator that is installed to cooling tower to target the actual structure, and the tuned mass damper(TMD) installation reduced vibration by the resonance phenomenon in the office and verified their performance. And proved structure sound reduction performance of coil style vibration-isolation spring installed to cooling tower. We wish to use to basis data about vibration isolator choice and building measure of inverter style cooling tower through this field example.

발포 알루미늄 샌드위치 패널의 차음성능

이중혁(Joong Hyeok Lee),안용찬(Yong Chan Ann),김석현(Seockhyun Kim) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.4

경춘선 일반 전동열차와 ITX의 실내 소음 특성

이중혁(Joong Hyeok Lee),안용찬(Yong Chan Ann),김석현(Seock Hyun) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.5

Since opening of the double track railway for the Gyeongchun local electric train and the semi-high speed train, ITX, floating population between Seoul and Chuncheon has rapidly increased. This is attributable to the competitiveness of the railway vehicle in aspect of punctuality and safety of the operation, mass transportation and low fare. However, in terms of the interior noise, many passengers have a strong dissatisfaction, especially in tunnel sections, and displeasure according to the high interior noise rapidly increases. In this study, interior noise characteristics of Gyeongchun local electric train and ITX are analyzed and compared- Noise levels, frequency spectrum and sound quality indices are compared between the open land, tunnel and bridge. By comparing the noise levels depending on the location in the compartment, we identify the noise transmission path and provide a basic strategy to reduce the interior noise.

경량 바닥 적층재 차음성능

이중혁(Jung-hyeok Lee),안용찬(Yong-chan Ann),김석현(Seock-hyun Kim),이덕희(Duck-hee Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12

Speed up of a high speed train requires weight reduction of the train body and it increases the interior noise and deteriorates the ride quality. In this study. in order to diagnose the possibility of the weight reduction of the train body, we compare the sound insulation performance and bending stiffness of layered elements of the train floor structure. As the layered elements, sound transmission losses of plywood, foamed aluminium and nomex honeycomb are measured according to ASTM E2249-02. In addition, total sound transmission losses are measured and compared on the floor layered structures, which consist of these elements and a damped aluminium extrusion panel. Finally, considering bending stiffness of each elements and a damped aluminium extrusion panel. Finally, considering bending stiffness of each element, the applicability of each element to the floor structure is comprehensively investigated.

The Experimental Study of Insertion Loss for Duct Silencer

Tae-Ho Lee(이태호),Yong-Chan Ann(안용찬) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.10

루버형 소음기 형상에 따른 삽입손실 특성에 관한 실험적 고찰

이태호(Tae-Ho Lee),이기륭(Ki-Ryung Lee),조정식(Jung-Sik Cho),안용찬(Yong-Chan Ann),김정인(Jung-In Kim) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4

Standard of living of latest people is improved and reaction about noise also became sensitive. Accordingly, examined Life noise regulation standard and Factory noise effluent quality standard in Noise and Vibration Control Act of the Ministry of Environment. Noise emitted to outdoors by jumbo and vast quantity anger of factory, industrial facilities and building was increased too. There is air conditioning equipment, each variety equipment ventilating openings, inlet or outlet of generator soundproofing box, cooling tower representatively. In this way, noise reduction countermeasure establishment about airborne sound that is produced is required. The Splitter style silencer and acoustic louver week for noise reduction of HVAC duct and ventilating openings. In this paper, experimented at reverberation chamber on KS ISO 7235 and ASTM E447. Evaluated comparison experimenting insertion loss and perssure loss by length and inside shape of Acoustic Louver. Execute regression analysis using experiment result and forecasted insertion loss of various length condition. Therefore, I wish to use to basic data so that can apply optimized acoustic louver after expect noise reduction amount by length or type of acoustic louver.