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세라믹 분말의 입자구조에 따른 나노 진동 흡수장치의 에너지 소산 효율 특성에 대한 연구
문병영,김흥섭,Moon, Byung-Young,Kim, Heung-Seob 한국재료학회 2003 한국재료학회지 Vol.13 No.3
This study shows an experimental investigation of a reversible nano colloidal damper, which is statically loaded. The porous matrix is composed from silica gel (labyrinth or central-cavity architecture), coated by organo-silicones substances, in order to achieve a hydrophobic surface. Water is considered as associated lyophobic liquid. Reversible colloidal damper static test rig and the measuring technique of the static hysteresis are described. Influence of the pore and particle diameters, particle architecture and length of the grafted molecule upon the reversible colloidal damper hysteresis is investigated, for distinctive types and mixtures of porous matrices. Variation of the reversible colloidal damper dissipated energy and efficiency with temperature, pressure, is illustrated. As a result, he proposed nano damper is effective one, which can be replaced the conventional damper.
복잡계의 세포자동화법을 이용한 뼈의 적응적 재구축에 관한 연구
문병영,박정홍,손권,Moon, Byung-Young,Park, Jung-Hong,Son, Kwon 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.7
An adaptive bone remodeling is simulated by using the cellular automata (CA) method. It is assumed that bone tissue consist of bone marrow, osteoclast, osteoblast cell or osteoprogenitor cell. Two types of local rule are adopted; those are the metabolism rule and adaptive bone formation rule. The metabolism rule is based on the interactions of cells and the bone formation rule is based on the adaptation against the mechanical stimulus. The history of load and memory of mechanical stimulus are also considered in the local rules. As a result, the pattern of distribution of the bone tissue is dynamically adequate and it is similar to intact cancellous bone.
문병영,강경주,강범수,김계수,Moon, Byung-Young,Kang, Gyung-Ju,Kang, Beom-Soo,Kim, Kye-Soo 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.10
The purpose of this study is to investigate the effect of mechanical properties of the FREI using horizontal stiffness and vertical stiffness by experiments. Two kinds of FREI are designed and fabricated. The steel plates of SREI are replaced with fibers in order to reduce the cost of fabrication and installation. At first, the Nylon fiber is adopted as feasibility study of FREI. The experimental results of Nylon FREI and SREI show that the vertical stiffness of Nylon FREI is lower than SREI, and effective damping is two times higher than SREI. Carbon is adopted, by these rusults, as strong reinforcement than Nylon and full scale of carbon FREI was designed and fabricated. By the experimental test results, it is shown that the vertical stiffness of carbon FREI is three times higher than SREI, and two times higher in effective damping. As a result, the proposed FREI can replace the SREI as a seismic isolator.
유선형 스텝 선형을 적용한 35 knot급 고속활주선의 성능평가에 대한 고찰
문병영(Byung Young Moon),고호남(Ho Nam Go),이기열(Ki Yeol Lee) 한국해안해양공학회 2018 한국해안해양공학회 논문집 Vol.30 No.3
고속 주행시 마찰저항을 감소시키기 위해 선체의 선저부분의 모양을 변화시키는 등 최근 관련 분야의 개발이 이루어지고 있는 바, 본 개발에서는 기하학적으로 고속활주선의 스텝 단면을 유선형(streamlined type) 구조로 제작해 침수 표면적에 의한 마찰저항의 최소화를 목적으로 준비하였다, 본 개발의 목적은 어업의 각종 위급상황 및 안전성을 고려한 고속활주선의 구조설계를 기반으로 하여 어업의 특수성 및 작업특성(어군 추적 및 어획물 출하)을 고려한 최적선형으로서 유선형 마찰저감형 고속활주선을 제작하는데 그 목표가 있으며, 이 과정에서 제작된 성과물에 대한 성능평가를 수행하여 정량적 목표치를 확보하고자 함에 본 기술개발 논문의 소개 배경이 있다. As a recent technical approach, a high-speed planing hull was tried to realize a friction reducing system by simultaneously actuating the triple streamlined step hull form in association with optimum speed of 35 knot planing for fishing boat. In this approach, the streamlined step hull form with triple structure of type was attached under the bottom of high-speed planing hull, while a friction resistance is reduced in the process of running at the speed of 35 knot. In addition, this research was to make a performance test as to the manufactured product and acquire the purposed values and the development items. Actually, after manufacturing the desired prototype of highspeed planing hull, the significant items, fuel efficiency (second) and amount of fuel consumption (degree) including maximum speed (knot) were estimated for a performance test. And tensile strength (MPa) and bend strength (MPa) as to the completed prototype like a high speed planing hull were also acquired during the test.
고함수율의 건설폐기물 폐 토속에 포함된 이물질 선별을 위한 분리스크린의 진동해석
문병영(Byung-Young Moon),배효동(Hyo-Dong Bae),곽광훈(Kwang-Hun Kwag),배기선(Kee-Sun Bae),송하영(Ha-Young Song) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.8
In this study, theoretical super screen vibration analysis has been carried out to predict the dynamic characteristics of interactive waste particles. In order to approach these problems, it is necessary to have a fundamental understanding the screening process and the process of both the remaining and the passed material on a screen with several interacting screen planes based on Soldinger(999) was discussed. Here, the vibrating screen is composed of three assemblies such as screen, wastes guide, and supported screen as shown in Fig. l. This model is regarded vibrator as the system of screen fixed tilt plates. Then materials(or particles) of different size is to be separated by using the eccentric vibrator and classifying tilt plates. As well moisturized construction wastes is more efficient to separate than moisture-less it. In processing separate mechanism, the more materials is light, the more staying time is long. Thus much lighter construction wastes(wood, Styrofoam, etc) and heavier materials are separated by staying time delay in a super screen. The design results, separation screen were able to know that small and larger particles are conspicuous difference each motion character according to trajectory particles, and small particles raise the probability in classifying tilt plates.
영구자석을 적용한 선박용 곡면 철판 이송용 유압식 마그네틱 클램프 이송장치의 성능평가에 대한 고찰
문병영(Byung Young Moon),이성범(Sung Bum Lee),이기열(Ki Yeol Lee) 한국해양공학회 2015 韓國海洋工學會誌 Vol.29 No.4
As a new technical approach, a hydraulic and magnetic clamp device was developed to realize a magnetic clamp crane system by simultaneously actuating eight individual hydraulic cylinders. In this approach, an Sr-type of ferritic permanent magnet (SrO·6Fe₂O₃), rather than the previous electromagnet, was utilized for the purpose of lifting and transporting the large curved steel plates used for manufacturing ships. This study had the goal of developing and manufacturing a hydraulic, magnetic clamp prototype composed of three main parts, including the base frame, cylinder joint, and magnet joint, in order to safely transport curved steel plates. Furthermore, this research included a performance evaluation of the manufactured prototype and acquired the purposed quantity value in the performance test. The most significant item, the magnetic adhesive force (G), was evaluated in a performance test, which utilized a ferritic permanent magnet (Sr type) with 3700~4000 G of residual induction (Br) and 2640/2770 Oe of coercive force (Hc). In particular, relevant items such as the hoist tension (kN), transportation time (s), and applied load (Kgf) on the hydraulic cylinders were also evaluated in order to determine the optimum values.