The optimal shape design of a linkage mechanism used for power shovel (Application of a nonlinear optimization method of the minimax type)

This article presents an optimal shape design methodology for heat convection problems. In this study, the shape of the convective medium is parameterized by means of non-uniform rational B-spline (NURBS) surfaces, and their control points represent the design variables. The convective domain is discretized by choosing the parameters of NURBS surfaces as generalized curvilinear coordinates, and the conservation equations are solved using the finite difference method. The simplified conjugate-gradient method (SCGM) is used as the optimization method to obtain the optimal shape and adjust the design variables intelligently. The methodology is demonstrated by optimizing the shape profile of a natural convective cavity with the objective of reducing the maximum wall temperature.

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Optimal Shape Design for Heat Conduction Problems Using NURBS

Volume 2: Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Computational Heat Transfer ◽

10.1115/ht2009-88613 ◽

2009 ◽

Author(s):

Farbod Fakhrabadi ◽

Farshad Kowary

Keyword(s):

Heat Conduction ◽

Optimization Method ◽

Optimal Shape ◽

Curvilinear Coordinates ◽

Shape Design ◽

Control Points ◽

Optimal Shape Design ◽

Design Variables ◽

Enhancing Heat Transfer ◽

Nurbs Surfaces

This article presents an optimal shape design methodology for heat conduction problems. In this study, the shape of the conductive medium is parameterized by means of non-uniform rational B-spline (NURBS) surfaces, and their control points represent the design variables. The conductive domain is discretized by choosing the parameters of NURBS surfaces as generalized curvilinear coordinates, and the heat conduction equation is solved using the finite difference method. The simplified conjugate-gradient method (SCGM) is used as the optimization method to obtain the optimal shape and adjust the design variables intelligently. The methodology is demonstrated by optimizing the profile of a straight fin with the objective of enhancing heat transfer rate and reducing the fin mass.

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Optimal design of a linkage mechanism used for fork lift (Application of a nonlinear optimization method of minimax type)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.52.570 ◽

1986 ◽

Vol 52 (474) ◽

pp. 570-576

Author(s):

Koichi ITO ◽

Tadashi KUROIWA ◽

Shinsuke AKAGI

Keyword(s):

Optimal Design ◽

Nonlinear Optimization ◽

Optimization Method ◽

Linkage Mechanism ◽

Nonlinear Optimization Method

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Optimal Shape Design for Radiative Enclosures Using NURBS

Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Heat Transfer Equipment; Heat Transfer in Electronic Equipment ◽

10.1115/ht2009-88615 ◽

2009 ◽

Author(s):

Farbod Fakhrabadi ◽

Farshad Kowsary

Keyword(s):

Optimization Method ◽

Optimal Shape ◽

Curvilinear Coordinates ◽

Shape Design ◽

Control Points ◽

Optimal Shape Design ◽

Design Variables ◽

Analysis Technique ◽

Radiosity Equation ◽

Nurbs Surfaces

This article presents an optimal shape design methodology for diffuse-walled radiant enclosures. In this study, the shape of the enclosure is parameterized by means of non-uniform rational B-spline (NURBS) surfaces, and their control points represent the design variables. The enclosure geometry is discretized by choosing the parameters of NURBS surfaces as generalized curvilinear coordinates, and the radiosity equation is solved using the infinitesimal-area analysis technique developed by Daun and Hollands [1]. The simplified conjugate-gradient method (SCGM) is used as the optimization method to obtain the optimal shape and adjust the design variables intelligently. The methodology is demonstrated by optimizing the shape profile of a cavity with the objective of enhancing the apparent emittance.

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