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선박 구조물의 진동 최적설계를 위한 NASTRAN 기반 최적화 프레임웍의 제안
공영모(Kong, Y.M.),최수현(Choi, S.H.),채상일(Chae, S.I.),송진대(Song, J.D.),김용한(Kim, Y.H.),양보석(Yang, B.S.) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.11
Recently, the issue of ship nitration due to the large scale, high speed and lightweight of ship is emerging. For pleasantness in the cabin, shipbuilders are asked for strict vibration criteria and the degree of nitration level at a deckhouse became an important condition for taking order from customers. This study proposes a new optimization framework that is NASTRAN external call type optimization method (OptShip) and applies to an optimum design to decrease the nitration level of a deckhouse. The merits of this method are capable of using of global searching method and selecting of various objective function and design variables. The global optimization algorithms used here are random tabu search method which has fast converging speed and searches various size domains and genetic algorithm which searches multi-point solutions and has a good search capability in a complex space. By adapting OptShip to full-scale model, the validity of the suggested method was investigated.
공영모(Y. M. Kong),최수현(S. H. Choi),송진대(J. D. Song),양보석(B. S. Yang) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Recently, the vibration reduction at the local structure such as compass deck has continuously requested by ship owner and shipbuilder. Because crews are afflicted with them and severe vibration problems affect on the damage of structure. This study conducted to get an optimized stiffener size of compass deck to reduce the vibration level and decrease the weight of structure in ship. NASTRAN external call type optimization software (OptShip) which makes using a solver module from NASTRAN is used as an optimization tool. The results indicate that the optimum design is promising for real applications.
채상일(S. I. Chae),송진대(J. D. Song),양보석(B. S. Yang),공영모(Y. M. Kong),최수현(S. H. Choi) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Recently, the importance of ship vibration is emerging due to the large scaling, high speed and lightning of ship. For pleasantness in a cabin, shipbuilders ask for strict vibration criteria and the degree of vibration level at a deckhouse became an important condition for taking order from customers. This study conducted normal modes analysis and forced response analysis for the deck house parts of the Container Ship.
심민찬 (M. C Shim ),양보석 (B. S. Yang ),공영모 (Y.M. Kong ) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
The wireless measurement system is developed for an effective vibration monitoring on the containership. Typically, Wi-Measys is deployed on a trial run of a constructed ship for measuring the ship's vibration. This development was performed as a solution for replacing existing wired instrumentations by wireless. The installations of wired DAQ system cause a manpower shortage, a cost prohibitive , limitation of measuring point and very susceptible to noise through coaxial cables in a complex structure of ship. However, these costs can be significantly reduced by utilizing a wireless system. Wi-Measys is applied on containership which conducted a vibration testing on an engine room, upper deck for estimating the new constructed ship's vibration limitation. This paper presented about how to apply a wireless measurement system and wireless local area network to a large ship have complex structure.