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배준영,BAE, Jun-Young 해양환경안전학회 2015 해양환경안전학회지 Vol.21 No.6
It was carried out a review of operating limit analysis for small high-speed boat by author. In general, a review of ship's seakeeping performance is performed in the step of ship design, but this study was carried out in the state of completion of boat. Motion performance of Pitch, Vertical and Lateral acceleration and Slamming were satisfied in some encounter angle but deck wetness was not satisfied in all it does the analysis. As a result, sea state rather than the speed and encounter angle of vessel have a greater effect on the seakeeping performance of target vessel. It seems to be due to the size of the target ship. 본 연구는 소형 고속정의 운항한계를 검토하기 위하여 수행되었다. 일반적으로 내항성능의 검토는 선형의 결정 단계 전에 이루어지지만 본 연구는 선박의 건조가 완료된 후에 이루어졌다. 검토 결과, 종동요, 수직 및 수평가속도, 슬래밍의 운동성능은 특정한 조우각을 제외하고는 만족하였으나 갑판침수의 경우에는 해석을 수행한 모든 조건에서 만족하지 않았다. 이것은 대상선박의 크기가 소형이기 때문에 선박의 속도나 파도와의 조우각보다는 해상상태가 설정한 내항성능 기준의 만족 여부에 더 큰 영향을 미쳤기 때문으로 보인다.
온도조건에 따른 균열주입제의 변형특성에 관한 실험적 연구
배준영 ( Bae Jun-young ),김재성 ( Kim Jae-sung ),곽주호 ( Kawk Ju-ho ),주동철 ( Joo Dong-chul ),김정환 ( Kim Jung-hwan ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
As use of crack repair materials in construction fields, much more research is required to fully investigate the properties of crack repair materials such as epoxy resins and silicates. Information concerning overall properties becomes more important and engineers require as more information about properties of such crack repair materials. The purpose of this study was to investigate the characteristics of bending deformation of two specific crack repair materials, namely epoxy resins and silicates, those are cured for 7 days at a temperature of 5°C, 20and 40°C. It is believed that the bending strength of epoxy resins is higher than silicates but silicates are more tough than epoxy resins. And both materials have a tendency to improve hardening performance as for increasing temperature, but silicates are more influenced by temperature.
건ㆍ습식 복합 분체이송 뿜칠시공시스템의 재료분리저항성에 관한 실험적 연구
배준영(Bae Jun-young),김재성(Kim Jae-Sung),김경덕(Kim Kyung-Deok),강석표(Kang Suk-Pyo),주동철(Joo Dong-Chul),김정환(Kim Jung-Hwan) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.9 No.2
Recently repair and reinforcement of large-sized reinforced concrete structures have been interested, because of their early deterioration and durability deterioration as time goes by. And adequate repair method has been required urgently in order to cope with these repair works which are growing bigger and larger. As one of appropriate repair method, spraying method has been discussed and applied job site recently. This study" is focused on the examination of quality stabilization dry mortar which is transferred mechanized and automated dry and wet compounded system. It is investigated that two important equipments are transfer hose wave and dry mixing hopper to increase material separation resistivity. In case of material transferred hose wave and dry type mixing hopper, quality stabilization shows much better result than not transferred. And appropriate transfer pressure and distance to decrease material separation is 0.8~0.9 bar and 150m. It is believed that the effect of shortening term of works and cost reduction will be expected by this mechanized and automated concrete repair system.
Manta형 무인잠수정의 조종운동 특성에 미치는 유체력미계수의 민감도 해석에 관한 연구
배준영(Jun Young Bae),손경호(Kyoung-Ho Sohn) 한국항해항만학회 2008 한국항해항만학회지 Vol.32 No.8
Mata형 무인잠수정 (Manta-type Unmanned Undersea Test Vehicle, 이하 MUUTV라 함)은 Naval Undersea Warfare Center의 Manta Test Vehicle의 설계 및 운용 개념을 기초보 하여 제안되었다(손 등, 2006). 본 연구에서는 Feldman(1979) 과 손 등(2006)의 6자유도 운동 수학모델을 이용하여 MUUTV의 조종운동 특성에 미치는 유체력미계수의 민감도 해석을 수행하였다. 민감도 해석 기법으로는 Sen(2000) 이 제안한 방법을 채택하였다. 본 연구를 통하여 각각의 유체력미계수가 MUUTV 의 조종운동 특성에 미치는 영향을 정량적으로 파악 할 수 있었으며, 상대적으로 영향을 작게 미치는 유체력미계수가 포함된 항을 제거하여 조종운동 수치 시뮬레이션을 수행하여도 운동 추정이 가능함을 알 수 있었다. Manta-type Unmanned Undersea Test Vehicle(MUUTV) ís based on the same design concept as Unmanned Undersea Vehicle called Manta Test Vehicle(MTV), which was originally built and operated by the Naval Undersea Warfare Center(Lisiewicz et al., 2000, Sirmalis et al., 2001). The authors carried out the sensitivity analysis of the response of manoeuvring motion of MUUTV to changes in hydrodynamic derivatives. In order to calculate the sensitivity indices of hydrodynamic derivatives on MUUTV, the method by Sen(2000) was adopted. Basically the dynamic mathematical model with six degrees of freedom by Feldman(1979) is used but a little revised, refered to Sohn et al.(2006) and some experiment in circulating water channel. Through the present research, some hydrodynamic derivatives of significance are found out, and also the numerical simulation using simplified mathematical model based on result of sensitivity analysis is ascertained to be enough for prediction of manoeuvring characteristics of MUUTV.
배준영 ( Bae Jun Young ),방진욱 ( Bang Jin Wook ),정우정 ( Chung Woo Jung ),김윤용 ( Kim Yun-yong ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
Based on the study of chloride migration coefficient and hydration heat evolution, it was found that the use of ternary blended cement was effective to achieve desired service life and minimum crack index. On the other hand, a high level of compressive strength is required for marine concrete mix design.
온도변화에 따른 표면보호재의 부착성능 및 변형 특성에 관한 실험적 연구
배준영 ( Bae Jun-young ),강석표 ( Kang Suc-pyo ),주동철 ( Joo Dong-chul ),김정환 ( Kim Jung-hwan ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
Normally, using coating material could result in different performance according to the various changes of environments or operation conditions. For these reasons, there are decreasing tendency for the durability, beauty and scenery of structures as the separation or exfoliation occurred after operation. Especially we must find out not only bond strength characteristics of coating material under temperature conditions but also bond strength reduction under heating-cooling repeat test because Korea has four distinct seasons. In this paper, the deformation and bond strength characteristics of coating material have been investigated, and we suggest some preliminary data of coating material for its best performance under various temperature condition.
배준영(Jun-Young Bae),반갑수(Kap-Soo Ban) 한국산업융합학회 2014 한국산업융합학회 논문집 Vol.17 No.3
Machine vision systems is applied for various industries such as optimize your spending, automate your production and maximize your efficiency. This research is effective for most optimal light condition of machine vision that technology was applied bald outside human visual acuity. Image processing converts a target image captured by a CCD camera into a digital signal and then performs various arithmetic operations on the signal to extract the characteristics of the target, such as points, lines, circles, area and length. The mathematical concepts of convolution and the kernel matrix are used to apply filters to signals, to perform functions such as extracting edges and reducing unwanted noise. This research analyze and compares matching ratio with reference image and search for optimal lighting condition in accuracy that user wants coming input image according to brightness change of lighting.