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- 저자 : V. Ho-Huu (검색결과 2 건)
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An efficient procedure for lightweight optimal design of composite laminated beams
V. Ho-Huu,T. Vo-Duy,D. Duong-Gia,T. Nguyen-Thoi 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.27 No.3
A simple and efficient numerical optimization approach for the lightweight optimal design of composite laminated beams is presented in this paper. The proposed procedure is a combination between the finite element method (FEM) and a global optimization algorithm developed recently, namely Jaya. In the present procedure, the advantages of FEM and Jaya are exploited, where FEM is used to analyze the behavior of beam, and Jaya is modified and applied to solve formed optimization problems. In the optimization problems, the objective aims to minimize the overall weight of beam; and fiber volume fractions, thicknesses and fiber orientation angles of layers are selected as design variables. The constraints include the restriction on the first fundamental frequency and the boundaries of design variables. Several numerical examples with different design scenarios are executed. The influence of the design variable types and the boundary conditions of beam on the optimal results is investigated. Moreover, the performance of Jaya is compared with that of the well-known methods, viz. differential evolution (DE), genetic algorithm (GA), and particle swarm optimization (PSO). The obtained results reveal that the proposed approach is efficient and provides better solutions than those acquired by the compared methods.
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T. Nguyen-Thoi,P. Phung-Van,V. Ho-Huu,L. Le-Anh 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.3
The paper presents an extension of the Edge-based Smoothed Finite Element Method (ES-FEM-T3) using triangular elements forthe dynamic response analysis of two-dimension fluid-solid interaction problems based on the pressure-displacement formulation. Inthe proposed method, both the displacement in the solid domain and the pressure in the fluid domain are smoothed by the gradientsmoothing technique based on the smoothing domains associated with the edges of the triangular elements. Thanks to the softeningeffect of the gradient smoothing technique used in the ES-FEM-T3, the numerical solutions for the coupled systems by the ES-FEMT3are improved significantly compared to those by some other existing FEM methods.
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