Cost-Effective Design of Structural Elements through the Process of Structural Optimization (original) (raw)

Efficient algorithms and models for mechanical and structural design optimization

Journal of Mechanical Engineering and Sciences

In the present work, different algorithms and penalty methods for design optimization of mechanical elements and structures are applied. Seven robust optimization techniques and seven penalty methods are thoroughly investigated and implemented in MATLAB codes. In addition, different optimization models are compared using two benchmark problems, namely, the minimal cost design of a welded beam structure and the optimal buckling design of a functionally graded material column. A performance measure factor is defined to determine the best technique among the implemented optimization algorithms. The results are arranged and nested to make it easy for the reader to figure out each technique characteristics, and hence choose the suitable one for a specific design problem and/or application. Comprehensive computer experimentations were performed, and the best optimization techniques and models have been thoroughly demonstrated. The attained optimal solutions show that, in general, the hybr...

Use of design optimization techniques in solving typical structural engineering related design optimization problems

Structural Engineering and Mechanics, 2015

High powered computers and engineering computer systems allow designers to routinely simulate complex physical phenomena. The presented work deals with the analysis of two finite element method optimization techniques (First Order Method-FOM and Subproblem Approximation Method-SAM) implemented in the individual Design Optimization module in the Ansys software to analyze the behavior of real problems. A design optimization is a difficult mathematical process, intended to find the minimum or maximum of an objective function, which is mostly based on iterative procedure. Using optimization techniques in engineering designs requires detailed knowledge of the analyzed problem but also an ability to select the appropriate optimization method. The methods embedded in advanced computer software are based on different optimization techniques and their efficiency is significantly influenced by the specific character of a problem. The efficiency, robustness and accuracy of the methods are studied through strictly convex two-dimensional optimization problem, which is represented by volume minimization of two bars" plane frame structure subjected to maximal vertical displacement limit. Advantages and disadvantages of the methods are described and some practical tips provided which could be beneficial in any efficient engineering design by using an optimization method.

Optimization in Structural Analysis and Design

2009

Two main tasks of a structural engineer, as for many other branches of engineering, are analysis and design. Among these two, the latter needs more knowledge, skill and experience. It even comprises completely the first one, that is, a designer must already have the capacity of analysis.

Structural Design Optimization-Numerical and Simulation Approaches

2019 ASEE Annual Conference & Exposition Proceedings

is a graduate of Elizabeth City State University, acquiring a Bachelor Degree of Science in Engineering Technology, focus on Mechanics and Automation. Momen also minored in Mathematics, as he desired to be versatile and knowledgeable in the Engineering world. His research interest are in structural engineering, bridges, and aspires further education in those fields.

Application of structural optimization using finite elements

Computer-Aided Design, 1987

This paper describes the theoretical basis of SDRC's redesign package, Optisen. The use of the program is illustrated using three realistic applications. First, the design of a plastic seat tub for strength requirements. Second, the design of an excavator arm for stiffness and strength requirements. Third, the modification of a helicopter for dynamic response.

The Effect of Optimization on the Design of Steel Structures

MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference, 2019

In structural design, it is difficult to find the best solution. Optimization help finding these. In this paper, the basis of cost calculation is shown and some applications on welded structures like a stiffened shell, planar truss structure, stiffened plates. The objective function is the cost or mass of the structure, the constraints are static, or dynamic stresses, stabilities, size constraints. The examples describe the benefits of optimization.

Design Optimization of Mechanical Elements and Structures: a Review with Application

Numerous applications of optimization techniques to solving real life engineering problems that are highly constrained with multiple objectives have been addressed in the literature. Important stage has now been reached at which an investigation of such developments and their practical possibilities should be made and presented. This paper presents the most outstanding progress and development achieved in the field of optimal design of mechanical and structural elements. A brief historical review of this technology, its current status and future needs are addressed in order to achieve an adequate picture of the subject. The authors present some of the important contributions made by the leading scientists of both the theoretical and practical aspects of the optimization of mechanical structures. The aim now is to assimilate this technology into the practicing design environment. As an application, the optimum design problem of a helical compression spring has been formulated and pre...