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분자 동역학 방식을 사용한 전역 최적화 기법에 관한 연구
최덕기,김재윤,Choi, Deok-Kee,Kim, Jae-Yoon 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.7
This paper addresses a novel optimization technique based on molecular dynamics simulation which has been utilized for physical model simulation at various disciplines. In this study, objective functions are considered to be potential functions, which depict molecular interactions. Comparisons of typical optimization method such as the steepest descent and the present method for several test functions are made. The present method shows applicability and stability in finding a global optimum.
최덕기,김창수,Choi, Deok-Kee,Kim, Chang-Soo 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.9
This paper addresses method which can be used for analyzing thermal stresses of a functionally graded material(FGM) using semi-analytical approach. FGM is a nonhomogeneous material whose composition changes continuously from a metal surface to a ceramic surface. An infinite one dimensional FGM plate is considered. The temperature distribution in the FGM is obtained by approximate Green's function solution. To expedite the convergence of the solutions, alternative Green's function solution is derived and shows good agreement with results from finite difference method. Thermal stresses are calculated using temperature distribution of the plate.
최덕기,김창수,Choi, Deok-Kee,Kim, Chang-Soo 대한기계학회 1998 大韓機械學會論文集A Vol.22 No.1
This paper addresses a method which can be used for analyzing thermal stresses of a functionally graded material(FGM) using semi-analytical approach. FGM is a nonhomogeneous material whose composition is changed continuously from a metal surface to a ceramic surface. An infinite one dimensional FGM plate is considered. The temperature distribution in the FGM is obtained by approximate Green's function solution. To expedite the convergence of the solutions, alternative Green's function solution is derived and shows good agreement with results from finite difference method. Thermal stresses are calculated using temperature distribution of the plate.