열 변형과 목적형상을 고려한 선체구조의 형상 최적설계
Shape Design Optimization of Ship Structures Considering Thermal Deformation and Target Shape
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초록
In this paper, we develop a shape design optimization method for thermo-elastoplasticity problems that is applicable to the welding or thermal deformation problems of ship structures. Shell elements and a programming language APDL in a commercial finite element analysis code, ANSYS, are employed in the shape optimization. The point of developed method is to determine the design parameters such that the deformed shape after welding fits very well to a desired design. The geometric parameters of surfaces are selected as the design parameters. The modified method of feasible direction (MMFD) and finite difference sensitivity are used for the optimization algorithm. Two numerical examples demonstrate that the developed shape design method is applicable to existing hull structures and effective for the structural design of ships.
Abstract
In this paper, we develop a shape design optimization method for thermo-elastoplasticity problems that is applicable to the welding or thermal deformation problems of ship structures. Shell elements and a programming language APDL in a commercial finite element analysis code, ANSYS, are employed in the shape optimization. The point of developed method is to determine the design parameters such that the deformed shape after welding fits very well to a desired design. The geometric parameters of surfaces are selected as the design parameters. The modified method of feasible direction (MMFD) and finite difference sensitivity are used for the optimization algorithm. Two numerical examples demonstrate that the developed shape design method is applicable to existing hull structures and effective for the structural design of ships.
참고문헌 (8)
- Choi, Jae-yeon, "Shape Design Optimization of Ship Structures Considering Thermal Deformation", Proceedings of the annual Autumn Meeting of The Society of Naval Architects of Korea, pp.514~519 (2003)
- Ha, Yoondo, "Design Sensitivity Analysis and Topology Optimization of Nonlinear Heat Conduction Problems", Proceedings of the annual Autumn Meeting of The Society of Naval Architects of Korea, pp.1119~1124 (2004)
- 송하철, "고유변형도 기반 등가하중법에 의한 보강판의 가열 교정 해석", 대한조선학회 논문집, 41(4), pp.85~91 (2004), 대한조선학회
- "ANSYS version 9.0 User Manual", ANSYS Inc, ~ (2004)
- Belegundu, A. D, "Optimization Concepts and Applications in Engineering" (1999), Prentice Hall, Inc.
- "DOT version 5.0 User Manual", Vanderplaats Research & Development, Inc., ~ (1999)
- Vanderplaats, G. N, "Numerical Optimization Techniques for Engineering Design with Applications" (1984), McGraw-Hill Book Company
- Vera B. Anand, "Computer Graphics & Geometric Modeling for Engineers" (1993), John Wiley & Sons, Inc.