• Journal of the Society of Naval Architects of Korea
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• v.38 no.3
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• pp.14-22
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• 2001

This paper presents the results of hull form design and powering performance for a 2.500 ton class trimaran frigate. A series of resistance tests and numerical calculations have been conducted to figure out the influences of side-hull form and position on the resistance characteristics of the trimaran. And the propulsion test was conducted to investigate the propulsion efficiency of the trimaran, and the powering performance of the trimaran was compared with that of the similar mono-hull ships in full scale. From the research it was found that the longitudinal position of side-hull had a large influence on the resistance characteristics of the trimaran while the side-hull form and transverse position had a small influence on it. The trimaran showed favorable resistance performance when the side-hull was located near the stern of trimaran, which was resulted from the fact that the side-hull stem was located near the primary wave hollow generated by the main hul1. The powering performance of the trimaran was superior to that of the similar mono-hull ships above the middle speed range.

• Journal of Korea Ship Safrty Technology Authority
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• v.6
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• pp.29-39
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• 2001

본 논문에서는 차세대 고속선에 적합한 선형의 하나로 거론되고 있는 삼동선의 개발 현황을 살펴보고, 실선으로의 가능성을 파악하기 위하여 적용 대상선을 2,500톤급 삼동형 함정으로 설정하여 개념설계를 수행한 결과를 보이고자 한다. 함정의 설계조건과 요구사항에 적합하도록 삼동선의 장점을 최대한 반영하여 초기 개념 설계를 수행하였으며, 이로부터 도출된 삼동선형의 유체역학적인 성능검토를 위해 저항추진, 내항 및 조종성능에 대한 연구를 수행하고 그 결과를 유사 단동선과 비교, 검토하였다. 연구결과의 가시화를 위하여 최종적으로 3차원 컴퓨터 그래픽 모델링하고, 실선의 1/100 축적모형을 제작하여 설계결과를 표현하였다.

• 한국전산유체공학회:학술대회논문집
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• 2001.05a
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• pp.66-71
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• 2001

본 논문은 삼동선의 선형특성에 대한 간략한 소개와 삼동선의 주선체 좌우에 설치되는 보조 선체의 위치가 조파저항성능에 미치는 영향과 그 최적위치선정을 위한 연구 결과를 보인다. 조파저항 계산기법을 이용하여 보조선체의 길이방향과 횡방향의 위치 변화에 대한 조파저항을 계산하였으며, 그 유용성을 검증하기 위하여 모형시험결과와 함께 비교하였다 본 연구를 통하여 보조선체의 횡방향 위치가 삼동선의 조파저항성능에 미치는 영향은 작으나, 길이방향 위치는 그 성능에 커다란 영향을 미치는 것으로 나타났다. 그리고 주선체의 선수부에서 발생된 커다란 파도의 파저에 보조선체의 선수가 놓이는 것이 저항성능에 가장 유리하며, 선속이 빨라짐에 따라서 그 최적위치는 선미쪽으로 옮겨가는 경향을 보였다.

• Special Issue of the Society of Naval Architects of Korea
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• 2006.09a
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• pp.71-76
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• 2006

Preliminary conceptual design of hulls is developed and a theoretical evaluation study performed for the comparison of the hull concepts. Systematic variation of the side hull location is carried out to find an optimum position of side hulls for a trimaran by CFD computation. In order to compare computed results, the model test of trimaran was carried out. Shallow water effect is considered due to the route which has critical water depth of 20m for the design speed and investigated on the condition of different speeds and water depth by the numerical computations.

• Journal of Korea Ship Safrty Technology Authority
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• v.16
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• pp.38-52
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• 2004

쌍동선이나 삼동선과 같은 다동체를 가진 선박의 선형과 유체 동력학적 특징들에 대하여는 실험과 동시에 수치적으로 널리 연구되어 왔다. 본 연구는 소형 다동체 레저낚시어선의 선형개발에 관한 연구로서 모형실험은 인하대학교 선형시험구조에서 수행되었으며 수치계산은 Euler 방정식의 유한차분해법이 이용되었다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.239-244
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• 2001

5∼7세 어린이 12명을 대상으로 생체 신호를 수집하여 기존의 생체 신호 처리 방법으로 감성을 추출하고 그 결과의 문제점을 보인다. 문제점들을 해결하기 위하여 Mental Stress를 측정하는 RRV, RPIAD 알고리듬을 적용하고 감성 완구에 적용 가능성 및 방법을 보인다. 이를 상품화할 수 있는 Affective Wearable 하드웨어를 설계하며 제안된 알고리즘과 하드웨어를 시험하고 검증하기 위한 Test Bed를 구성한다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.16 no.6
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• pp.1-15
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• 2017

Recently terrorism targets unspecified masses and causes massive destruction, which is so-called Super Terrorism. Many countries have tried hard to protect their citizens with various preparation and safety net. With inexpensive and advanced technologies of sensors, the surveillance systems have been paid attention, but few studies associated with the classification of the pedestrians' trajectories and the difference among themselves have attempted. Therefore, we collected individual trajectories at Samseoung Station using an analytical solution (system) of pedestrian trajectory by LiDAR sensor. Based on the collected trajectory data, a comprehensive framework of classifying the types of pedestrians' trajectories has been developed with data normalization and "trajectory association rule-based algorithm." As a result, trajectories with low similarity within the very same cluster is possibly detected.

• Journal of the Korean Society for Marine Environment & Energy
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• v.9 no.2
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• pp.98-108
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• 2006

The vessels, already built and is operating in Korea, have the hull form of catamaran, with LOA(Length Over All) 15 m, LBP(Length Between Perpendiculars) 12 m, GT(Gross Tonnage) 9.77ton, Light Load Displacement 15.1ton. Korean Society of Ship Inspection & Technology, Chungnam National University, Inha University, Seoul National University and Advance Marine Tech co. ltd developed by cooperation it for fishing vessels. And it used FRP(Fiber Reinforced Plastics) for hull material and main engine of diesel $360ps{\times}2800rpm{\times}2sets$ with a water jet system. Based on these results, this paper describe small leisure fishing vessels with multi-hull, in relation to the project of CTYS(Regional Reserch Center for Transportation System of Yellow Sea Inha University) that aimed to development of trimaran hull form(LOA=17m, LBP=14m(Side Hull=6m), GT=9.77ton, Light Weight=11.2 ton).

• Journal of the Society of Naval Architects of Korea
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• v.44 no.6
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• pp.635-646
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• 2007

Human Powered Vessel Festival (HPVF) hosted by the College of Engineering of Chungnam National University, the Society of Naval Architects of Korea and the Korea Ocean Research & Development Institute has been held annually in Daejon since 1999. Solar boat powered by solar energy appeared for the first time in 2006, and it is expected that more new teams will enter this competition in the coming years. In this paper it is described that design procedures and manufacture processes of the solar boat named EPISODE. Firstly, It is aimed to understand compositions of the electric system and their performance properties and to show the design procedures using commercial design packages line WAVIS, CATIA, HCAD etc. Through the trial test, we confirmed ship speed, maneuverability, durability and operation condition of the electric system and found some problems. We plans to make reported problems go away and install hydrofoils for more improved speed performance.

• Journal of Ocean Engineering and Technology
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• v.20 no.3 s.70
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• pp.88-95
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• 2006

The resistance characteristics of a trimaran are studied, varying the bottom profile and transom stern of the main hull. The bottom profile is varied in three cases (convex, flat, concave). Using the experimental and numerical methods, the resistance performance of each hull form is compared. The experiments are carried out in ship model basin, and the numerical simulations are performed by a finite-difference method, based on the Marker and Cell scheme. Euler and continuity equationsare used for the governing equations of the flaw field around a trimaran with transom stern. The agreement of both results is good. The optimal bottom profiles for transom stern are presented for law-speed and high-speed regions, respectively.