• 제목/요약/키워드: Sea-trial

검색결과 349건 처리시간 0.024초

우리나라 시운전 선박의 해양사고 위험성 조사 분석 연구 (A Study on Risk Analysis of Marine Accident for Sea Trial Ships)

  • 박영수;김종성;김종수;이윤석;김세원
    • 수산해양교육연구
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    • 제27권3호
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    • pp.696-705
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    • 2015
  • Approximately 4,000 vessels including sea trial ships per day are passing, entering or departing from Korea coastal waterway. Sea trial ships have erratic navigating patterns such as quick turning, crash stop and do not communicate with other vessels in appropriate time, so sea trial ships are often to expose dangerous situation such as collision in heavy traffic area. To identify the sea trial vessel's risk factors, this paper surveyed marine traffic volumes for 7 days in Korea harbour & coastal waterway, and it analyzed marine accident rate and intended to identify the risk degree of passing vessels. After that, this researched how many sea trial ship's traffic and what is the sea trial risk among sea trial items. We also conducted survey questionnaire and identified risk factors of sea trial ship. So this paper aimed to enhance the safety of korea coastal waterway to prevent sea trial ship's marine accident.

시운전과 수리시험선박에 관한 고찰 (A Study on a Sea Trial and repaired test ship)

  • 박정훈;안중현
    • 한국항해항만학회:학술대회논문집
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    • 한국항해항만학회 2023년도 춘계학술대회
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    • pp.7-9
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    • 2023
  • 국내법에서는 시운전 금지해역을 설정하고 이 구역에서 금지되는 시운전(Sea trial)을 규정하고 있다. 하지만 이용자에 따라 시운전이라는 용어를 수리 후 테스트(On board Test)하는 것을 혼용하여 사용하고 있고, 특히 수리 조선소 등에서 선박의 개조, 수리 후 시운전이라 행하는 테스트를 하는 선박은 이러한 규정을 따르지 아니한다. 본 연구를 통하여 이러한 선박도 시운전으로 해석할 수 있는지 관련 법 조항을 살펴보고, 시운전 선박에 준하는 위험성을 내포한 수리 선박 관리의 필요성을 제시하고자 한다.

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심해용 크랩스터 CR6000 시스템의 실해역 시험 결과 (The sea Trial of Deep-sea Crabster CR6000 System)

  • 전봉환;유승열;이판묵;박진영;심형원;백혁
    • 대한임베디드공학회논문지
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    • 제12권5호
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    • pp.331-341
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    • 2017
  • This paper presents the sea-trial results of Crabster CR6000 which is a deep-sea walking robot developed by KRISO in 2016. Crabster CR6000 is designed to inspect deep-sea environment rejecting the disturbance on the silent and calm abyssal area. The sea-trial was conducted at the East Sea and the Philippine Sea on December 2016. The Crabster CR6000 undocked successfully from the Shuttle after touchdown on the sea-bed and walked out on the soft sediment soil of the 4,743m seafloor at the fourth diving in the Philippine Sea. The advanced technologies and capabilities of CR6000 were verified from the operational and functional test conducted in the sea-trial. The experimental data acquired from the sea-trial were summarized and the first experience of the deep-sea walking robot was presented in this paper.

Study on the Difference of the Maneuvering Characteristics of a VLCC in Standstill from those of her in Running

  • Lee, Chun-Ki
    • 한국항해항만학회지
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    • 제33권9호
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    • pp.623-628
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    • 2009
  • The objective of this paper is to make clear the difference of maneuvering characteristics of a VLCC in standstill from those of her in running. The authors made mathematic models to calculate maneuvering motions of a VLCC in standstill using various ahead engine with full rudder angle and calculated their motions in each case and compared the calculated values with those of the same vessel running in sea trial tests. The difference of motions between them is great. For example, a VLCC in standstill can achieve a great alteration of heading over 90 degrees within the distance of 0.2L advance while she advances 3.0L for 90 degrees turning in full running sea trial turning test. Therefore whenever a VLCC in standstill meets a vessel approaching in collision course situation in near distance, it is better and recommendable that she should use her ahead engine with full rudder to avoid collision. So "maneuvering trial tests in standstill conditions" should be added to the content of sea trial tests when a newly built VLCC commence to take sea trials, that has not been included until now.

빙두께 및 강도 보정기법을 이용한 모형시험결과의 실선시운전 적용연구 (Study on the Correction Method of Ice Strength and Thickness Applied to the Sea Trial Condition Based on the Ice Model Test Results)

  • 이승기;김문찬;이원준;김현수;이춘주
    • 대한조선학회논문집
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    • 제48권5호
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    • pp.457-464
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    • 2011
  • This paper deal with the validation of correction method of ice strength and thickness to the sea trial condition based on the ice model test results. It is very difficult to conduct the model test corresponding to the sea trial condition exactly. In addition, the available sea trial data is not sufficient for the validation of correction method. In the present study, the model test results of Terry-Fox ice breker have been used to compare the corrected results of sea trial test by varying its thickness and strength of model ice. The HSVA and ITTC methods have been applied to the present comparisions and the required power has been also validated by using the HSVA method. There are rather good agreement between the sea trial result and model test corrected by the HSVA and ITTC method. The more comparisons are expected to be carried out in near future.

해상교통량 조사 기반 시운전금지해역 설정 기초 연구 (A Basic Study on Establishment of Sea Trial Prohibition Waterway Based on Marine Traffic Survey)

  • 박영수;김진권;김종성;김종수;이윤석;박상원
    • Journal of Advanced Marine Engineering and Technology
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    • 제39권3호
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    • pp.318-325
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    • 2015
  • 우리나라는 세계 조선 강국으로 많은 선박이 우리나라 조선소에서 건조되고 있다. 건조된 선박은 선주에게 인도되기 전 한국연안에서 해상 시운전을 실시한다. 해상 시운전의 특성상 통항량이 많은 해역에서 주변을 항행중인 선박에 위험한 상황이 자주 발생한다. 이러한 위험으로 인하여 최근 5년간 해상시운전 중에 발생한 충돌사고가 매년 1건 이상으로 조사되었다. 이 연구에서는 해상시운전이 타 선박 통항에 약 30%의 위험성을 증가시키는 것으로 해상교통류 시뮬레이션을 통하여 식별하였다. 그리고, 우리나라 연안을 대상으로 7일 동안 AIS 자료 수집을 통하여 해상교통량 밀집도를 분석하고, 최근 5년간 해양사고 위치 분석을 통하여 선박운항자의 위험부담이 거의 없는 전체 교통량 10/100 수준에서 시운전선박의 시운전금지해역을 각 지역별로 설정하였다. 또한 시운전금지해역 설정을 위한 기초 법령안을 검토하였다. 시운전금지해역 설정을 통하여 연안해역을 통항하는 선박의 안전성 향상을 도모하여 해양오염 예방에 이바지하고자 한다.

FRP 복합재료 방향타 장착 근해어선의 해상시운전시험 결과분석 (Result Analysis of Sea Trial Test for Offshore Fishing Boat Attached FRP Rudder)

  • 박충환;장호윤;박명식;임남균
    • 한국해양공학회지
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    • 제27권6호
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    • pp.112-118
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    • 2013
  • This paper reports the results of a comparative study on rudder performance between the steel rudders that have been used in coastal angling fishing boats in the 20-GT class and the newly developed FRP composite material rudders. In order to compare the rudder performances of these two types, a sea trial test was carried out to investigate the speed performance, fuel consumption, and ship's turning ability. The results showed that the sea trial performance of the FRP composite rudder was better than that of the steel rudder type in terms of the sea speed, fuel consumption rate, and turning ability.

쇄빙연구선 "Araon"호를 활용한 빙해역 속력 시운전에 관한 연구 (A Study on the Speed Sea Trial on the Ice Field for Ice Breaking Research Vessel "Araon")

  • 김현수;이춘주;정성엽;최경식
    • 대한조선학회논문집
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    • 제48권5호
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    • pp.421-425
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    • 2011
  • To know the speed performance of "ARAON" in Arctic ice field, the measurement of ice properties which is ice thickness & strength, snow depth and free board were performed on July 2010. The measuring method of nautical signals such as heading angle, power of engine, wind & current information etc. was described in this paper. The speed sea trials in ice were performed on the four different positions with different ice properties and engine powers because the uniform level ice is not detected in the Chukchi Sea. The test field was partially constrained ice floe with hummocks and it was superposed with small broken ice pieces each other. All of the measured ice properties were compared and evaluated according to the results of sea trial. The relations between speed, ice thickness, strength and power were summarized. Consequently according to the sea trial results, the speed of ARAON is 2.78knots at the 2.49m ice thickness with 6.55MW engine power.

해상시험 결과를 이용한 RIB의 4자유도 동력학 식별 (I) - 해상시험, 저항·추진 모델 (Identification of Four-DOF Dynamics of a RIB using Sea Trial Tests (I) - Sea Trial Test, Resistance and Propulsion Model)

  • 윤현규;윤근항;박인홍
    • 대한조선학회논문집
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    • 제48권1호
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    • pp.8-14
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    • 2011
  • RIB(Rigid Inflatable Boat) is widely used for coastal transportation in the commercial use and for ISR(Intelligence, Surveillance, Reconnaissance) in the military use. Since RIB is around 10 meters in length and over 30 knots in speed, its motion characteristics in waves is quite different from a large scale ship. When it turns, large roll occurs and heeling direction is opposite to the large ship's case. Currently, many countries are developing USV(Unmanned Surface Vehicle) of which type is RIB. In order to develop high performance autopilot and way point controller, it is very important to identify RIB's motion characteristics. In this paper, sea trial test results of a 7-meter RIB such as speed, turning, zig-zag, and way point control tests were represented and its resistance and propulsion model was identified by using sea trial data and Savitsky's formula. In addition, the state space model which will be used in the identification of the four-degree-of-freedom dynamics in the next step was formulated and the identification procedure was proposed.

빙해역 시운전 해석을 위한 환경조건 보정 방법 및 검증 (Correction Methods and Validation for Environmental Conditions in the Ice Field Trials)

  • 김현수
    • 대한조선학회논문집
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    • 제56권2호
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    • pp.117-127
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    • 2019
  • Vessel's ice speed performances will be verified in ice sea trial but environmental conditions of ice fields are changeable according to the weather condition of ice trial area. Speed performance has to correct in the no wind, wave and current etc. after sea trial. Especially finding ice fields which is exact the same as owner's ice thickness and strength requirements is not easy. Therefore speed correction according to environment condition has to be done after sea trial measurements. Correction methods for ice thickness, ice strength, wave, wind and ship draft, trim, ice drift etc. are checked in ice sea trial based on literature review such as ISO standard, ITTC recommendation, journal papers and proceedings of conferences. Possibility of application for current and ice drift correction in ice field are discussed and measuring schemes and procedures of correction methods are described in this paper. All of correction schemes are calculated for 'Araon' which is ice breaking research vessel with Arctic and Antarctic ice field test results. Analyzed results shows that Araon is satisfied with her official ice speed performance of 3 knots with 10MW power at 1m ice thickness, 570kPa ice flexural strength.