Shape optimization of insulator sheds
TL;DR: In this article, a computer-aided design technique for obtaining the optimum shapes of insulator sheds is presented, with the mass as the objective function to be minimized and the specified electrical and mechanical performance requirements as the constraints.
Abstract: A computer-aided design technique for obtaining the optimum shapes of insulator sheds is presented. The non-linear shape optimization problem is formulated with the mass as the objective function to be minimized and the specified electrical and mechanical performance requirements as the constraints. The shape of the shed is numerically represented by the key dimensions of the shed. Finite element analysis is utilized repeatedly to obtain the stresses at critical points during the optimization iterations. A computer program has been developed to test the presented technique. The required specifications of the shed and an initial design are input to the program. Smooth convergence to the optimal design, with drastic changes in the shape, takes place without any user interaction even when the initial design is infeasible.
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TL;DR: In this article, a structural optimization approach is presented which aims to determine the optimum topological locations of supports or columns in a structure, with the objective of minimizing the maximum displacement or moment.
25 citations
TL;DR: In this article, a shape optimization study for the umbrella-shaped axisymmetric shell of variable thickness with the self-weight as the dominant load is presented, and the importance of the proper selection of the design variables is highlighted.
8 citations
References
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Book•
01 Jan 1976
TL;DR: Numerical methods in finite element analysis, Numerical techniques in finite elements analysis, and so on.
Abstract: Numerical methods in finite element analysis , Numerical methods in finite element analysis , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
2,085 citations
01 Aug 1973
TL;DR: This manual describes the use of CONMIN and defines all necessary parameters so that the program can be used without special knowledge of optimization techniques.
Abstract: CONMIN is a FORTRAN program, in subroutine form, for the solution of linear or nonlinear constrained optimization problems. The basic optimization algorithm is the Method of Feasible Directions. The user must provide a main calling program and an external routine to evaluate the objective and constraint functions and to provide gradient information. If analytic gradients of the objective or constraint functions are not available, this information is calculated by finite difference. While the program is intended primarily for efficient solution of constrained problems, unconstrained function minimization problems may also be solved, and the conjugate direction method of Fletcher and Reeves is used for this purpose. This manual describes the use of CONMIN and defines all necessary parameters. Sufficient information is provided so that the program can be used without special knowledge of optimization techniques. Sample problems are included to help the user become familiar with CONMIN and to make the program operational.
487 citations
247 citations
Book•
30 Jun 1988
TL;DR: In this paper, the authors provide a guide to the whole field of high voltage insulators as used in electrical power networks, traction and production, covering the historical development of the shapes of modern types, describes the principles materials both ceramic and polymeric and their fabrication, explains the physical principles of contamination and flashover, and reviews the mass of data on research and testing.
Abstract: This book provides a guide to the whole field of high voltage insulators as used in electrical power networks, traction and production. It covers historical development of the shapes - sometimes strange ones - of modern types, describes the principles materials both ceramic and polymeric and their fabrication, explains the physical principles of contamination and flashover, and reviews the mass of data on research and testing.
226 citations
TL;DR: In this article, the shape design capability is demonstrated on practical problems which result in as much as 35% weight savings over a uniform thickness design with fixed boundaries, which can be achieved by including in the design process the capability for varying the shape of boundaries and the shape and location of cutouts.
Abstract: In the past, much of the work done in structural optimization consisted of resizing the members of fixed configuration models. There is, however, a broad class of plate and shell problems in which an additional 'reduction in mass can be attained by including in the design process the capability for varying the shape of boundaries and the shape and location of cutouts. This additional capability has made it necessary to address other problems such as how to maintain an adequate finite element model, how to define perfectly general shapes which satisfy a number of criteria, and how to impose the proper constraints so that a realistic design results. The shape design capability is demonstrated on practical problems which result in as much as 35% weight savings over a uniform thickness design with fixed boundaries.
113 citations