• 한국해양공학회지
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• 제36권6호
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• pp.380-389
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• 2022

In the Haeundae area of Busan, South Korea, damage has continued to occur recently from building wind from caused by dense skyscrapers. Five wind observation stations were installed near LCT residential towers in Haeundae to analyze the effect of building winds during typhoon Omais. The impact of building wind was analyzed through relative and absolute evaluations. At an intersection located southeast of LCT (L-2), the strongest wind speed was measured during the monitoring. The maximum average wind speed for one minute was observed to be 38.93 m/s, which is about three times stronger than at an ocean observation buoy (12.7 m/s) at the same time. It is expected that 3 to 4 times stronger wind can be induced under certain conditions compared to the surrounding areas due to the building wind effect. In a Beaufort wind scale analysis, the wind speed at an ocean observatory was mostly distributed at Beaufort number 4, and the maximum was 8. At L-2, more than 50% of the wind speed exceeded Beaufort number 4, and numbers up to 12 were observed. However, since actual measurement has a limitation in analyzing the entire range, cross-validation with computational fluid dynamics simulation data is required to understand the characteristics of building winds.

• 한국해안해양공학회지
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• 제19권4호
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• pp.329-335
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• 2007

해수면의 상태를 보고 파고를 측정하는 목측은 선박이나 먼 바다에서의 파랑관측 방법으로 여전히 이용되고 있으며, 오랜 경험을 가진 숙련자의 경우에는 상당히 정확하게 파고를 관측할 수 있다. 이러한 목측의 표준지표로 뷰퍼트(Beaufort) 풍력계급표가 가장 널리 이용되고 있다. 그러나 이 지표에 설명된 해수면의 모양은 연구자 또는 일반인에게는 친숙하지 않기 때문에 파고별 대표영상 등의 보다 구체적인 참고자료가 필요하다. 현대의 현장계측기술은 실시간으로 해양관측자료를 획득할 수 있는 수준에 이르렀으며, 기존의 파고 및 기상 관측시설과 함께 현장의 해상상태 영상자료까지 획득할 수 있게 되었다. 본 연구에서는 속초 조도동방등표에 설치되어 운영 중인 실시간해양관측 시스템에 무선영상전송장치를 설치하여 파랑자료와 영상이미지를 수집하고 유의파고별로 현장이미지를 비교 및 분류하였다. 관측된 해상상태 영상들과 뷰퍼트 풍력계급표의 해면 상태 설명과 비교한 결과 해상상태 영상자료의 가치를 확인할 수 있었다. 뷰퍼트 풍력계급표는 순수하게 목측이나 파고척을 이용하여 목측으로 만들어진 것에 비해 본 연구의 결과는 정밀한 파고센서와 과학적인 해상상태 영상정보 수집으로 파고의 실체적인 모습을 파악할 수 있었으며 관측파고의 신뢰성을 제고할 수 있는 기회가 되었다.

• 환경영향평가
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• 제21권1호
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• pp.201-208
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• 2012

Global warming due to the climate change causes environmental problems such as urban heat island (UHI), air pollutant deposition, urban heavy rainfall, etc. Urban stream plays an important role on mitigating UHI as open space as well as an ecological corridor in urban area. In order to investigate the wind characteristics of urban stream in the case of Yangjae Stream at Daechi-dong, Gangnam-gu in Seoul, the wind direction and wind speed data were observed and analyzed using a propellor type RM-Young wind monitor. The results show that the prevailing wind direction was southwest. However, easterly wind is the prevailing one between 8:00 and 12:00. Strong wind whose Beaufort scale is four or more blew frequently from 12:00 to 18:00. In terms of seasonal frequency, the spring shows the highest frequency, then winter was the next.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2006년도 추계학술발표회
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• pp.303-308
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• 2006

이 연구의 목적은 부산항에 입항하는 대형 콘테이너 선박의 안전 접안 조종을 위한 한계풍속을 설정하는데 있다. 계산결과, 정상풍속 13.5m/sec 이하의 바람에서는 예선 4500H.P.의 Z. peller 2척을 이용하여 안전 접안 조선하는데 큰 위험이 없음을 알았다. 그러나 돌풍율 25%를 포함한 강풍 16.9m/sec 이상의 기상상태에서는 선박조종이 위험하게 됨을 알았고, 돌풍율을 포함하여 풍속이 16.9m/sec 에 달하는 강풍하에서 대형 콘테이너 선박을 부득이 접안 조종할 때는 4500 H.P.Z. peller 3척으로 조선보조를 받아야 함을 알았다.

• 한국해양공학회지
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• 제35권6호
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• pp.414-425
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• 2021

Overcrowding of high-rise buildings in urban zones change the airflow pattern in the surrounding areas. This causes building wind, which adversely affects the wind environment. Building wind can generate more serious social damage under extreme weather conditions such as typhoons. In this study, to analyze the wind speed and wind speed ratio quantitatively, we installed five anemometers in Haeundae, where high-rise buildings are dense, and conducted on-site monitoring in the event of typhoon OMAIS to determine the characteristics of wind over skyscraper towers surround the other buildings. At point M-2, where the strongest wind speed was measured, the maximum average wind speed in 1 min was observed to be 28.99 m/s, which was 1.7 times stronger than that at the ocean observatory, of 17.0 m/s, at the same time. Furthermore, when the wind speed at the ocean observatory was 8.2 m/s, a strong wind speed of 24 m/s was blowing at point M-2, and the wind speed ratio compared to that at the ocean observatory was 2.92. It is judged that winds 2-3 times stronger than those at the surrounding areas can be induced under certain conditions due to the building wind effect. To verify the degree of wind speed, we introduced the Beaufort wind scale. The Beaufort numbers of wind speed data for the ocean observatory were mostly distributed from 2 to 6, and the maximum value was 8; however, for the observation point, values from 9 to 11 were observed. Through this study, it was possible to determine the characteristics of the wind environment in the area around high-rise buildings due to the building wind effect.

• 환경영향평가
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• 제16권6호
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• pp.503-510
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• 2007

Since 1990s many skyscrapers have been built in Seoul. However, gusty winds occur among tall buildings by descending turbulences due to the upper air blocking. This study aims to investigate the wind characteristics of skyscraper prevailing wind direction. In order to evaluate the building wind in this area, The wind speed and the wind direction were measured using propeller type RM-Young wind monitor in this study. The maximum wind speed was recorded by 15.1 m/sec and the main wind direction is WNW and NW. The ultimate purpose of this study is to figure out the phenomena of building wind impact and also to provide essential basic data for establishing proper guidelines in building wind impact assessment for skyscrapers in Korea.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 추계학술발표회
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• pp.163-166
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• 2003

The seasonal mean wind direction and wind speed in a greater coasting area are investigated using the ECMWF(European Centre for Medium-Range Weather Forecasts) data for 11 years from 1985 to 1995. In winter, the main wind direction in Korea and vicinity, Taiwan and vicinity, and the North Pacific Ocean of middle latitudes is a northwesterly wind, northeasterly wind, and westerly wind respectively. The wind speed is strongest in the East China Sea, the South China Sea, and the North Pacific Ocean of low latitudes(Beaufort wind scale 5-6). A distribution pattern of wind direction in spring and fall is similar to that in winter. Seasonal mean wind speed is strongest in winter and the next is fall. The wind speed in summer is generally weak. However, that in the Indochina and vicinity is strong by the influence of Asian monsoon.

• 한국기계가공학회지
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• 제12권1호
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• pp.15-21
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• 2013

The safety and stability of 5MW class offshore wind turbine Jack-up platform was investigated through ocean basin experiment. For simulating the environmental condition of yellow sea in the South Korea, diverse waves, winds and currents were performed based on Froude's number. Regular wave and irregular wave based on Froude's number were applied to the wind turbine structure. In experiments, the height and period of regular wave type were scaled down as the 1:50 ratio of real wave condition. Irregular wave type was simulated with TMA(Texel Storm, Marsen and Arsloe)spectrum. The vertical reaction force, resonance period and wave pressure applied to multi-supporters of wind offshore structure were measured experimentally. Finally, the results showed that the capsizing situation of the offshore structure was generated by the severe environmental condition.

• 응용통계연구
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• 제30권5호
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• pp.633-645
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• 2017

본 연구는 컨테이너선의 연료 소비 패턴의 발견을 위해 운항데이터 분석의 통계적 절차를 제안한다. 우리는 현 시점의 연료 소비를 발견하기 위해 연료 소비에 영향을 미치는 변수들을 파악하는 동시에 예측 모델을 개발 및 적용하는 것을 목적으로 한다. 선박의 데이터는 크게 운항데이터와 기기데이터로 분류할 수 있으며, 운항데이터는 항로, 항해 정보, 대수속도, 대지속도, 바람과 같은 외력에 대한 정보 등이 있고, 기기데이터는 엔진출력, RPM, 연료 소모량, 기기들의 온도 및 압력 등이 있다. 본 연구에서, 우리는 선박에 미치는 외력의 영향을 Beaufort Scale (BFS)을 기준으로 구분한 후에 PLS 회귀분석을 통한 예측 모델을 개발하였다.

• 해양환경안전학회지
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• 제13권2호
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• pp.147-153
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• 2007

이 연구의 목적은 부산항에 입항하는 대형 컨테이너 선박의 안전 접안 조종을 위한 한계풍속을 설정하는데 있다. 계산결과, 정상풍속 13.5m/sec 이하의 바람에서는 예선 4500H.P.의 Z. peller 2척을 이용하여 안전 접안 조선하는데 큰 위험이 없음을 알았다. 그러나 돌풍율 25%를 포함한 강풍 16.9m/sec 이상의 기상상태에서는 선박조종이 위험하게 됨을 알았고, 돌풍율을 포함하여 풍속이 16.9m/sec 에 달하는 강풍 하에서 대형 컨테이너 선박을 부득이 접안 조종할 때는 4500 H.P. Z. peller 3 척으로 조선보조를 받아야 함을 알았다.