scholarly journals Conceptual Design and Structural Optimization of NASA Environmentally Responsible Aviation (ERA) Hybrid Wing Body Aircraft

2016 ◽  
Author(s):  
Jesse Quinlan ◽  
Frank H. Gern
Keyword(s):  
Structural Optimization ◽  
Conceptual Design ◽  
Environmentally Responsible

Concurrent Design and Evaluation Based on Structural Optimization using Structural and Function-oriented Elements at the Conceptual Design Phase

2005 ◽  
Vol 13 (1) ◽  
pp. 29-42 ◽  
Author(s):  
Akihiro Takezawa ◽  
Shinji Nishiwaki ◽  
Kazuhiro Izui ◽  
Masataka Yoshimura ◽  
Hidekazu Nishigaki ◽  
...  
Keyword(s):  
Structural Optimization ◽  
Conceptual Design ◽  
Concurrent Design ◽  
Design Phase ◽  
Conceptual Design Phase ◽  
And Function

scholarly journals Optimal Fire Design of Steel Tapered Portal Frames

2017 ◽  
Author(s):  
Tamás Balogh ◽  
Gergely László Vigh
Keyword(s):  
Structural Optimization ◽  
Conceptual Design ◽  
Structural Safety ◽  
First Order ◽  
Design Concepts ◽  
Optimization Framework ◽  
Reliability Method ◽  
Discrete Nature ◽  
Optimal Configurations ◽  
Fire Design

The development of new and valuable conceptual design concepts based on structural optimization results is the global aim of the presented research in order to assist the industry in economical fire design of steel tapered portal frames. In order to find optimal configurations regarding the life cycle of the structure, a complex, reliability based structural optimization framework has been developed for tapered portal frame structures. Due to the high nonlinearity and discrete nature of the optimality problem, Genetic Algorithm is invoked to find optimal solutions according to the objective function in with the probability of failure is evaluated using First Order Reliability Method. The applied heuristic algorithm ensures that a number of possible alternatives are analysed during the design process. Based on evaluation of the results of a parametric study, new conceptual design concepts and recommendations are developed and presented for steel tapered portal frames used as storage hall related to optimal structural safety, common design practice and optimal structural fire design.

scholarly journals Cluster-Based Optimization of Cellular Materials and Structures for Crashworthiness

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Kai Liu ◽  
Duane Detwiler ◽  
Andres Tovar
Keyword(s):  
Global Optimization ◽  
Structural Optimization ◽  
Conceptual Design ◽  
Nonlinear Models ◽  
Material Design ◽  
Cellular Materials ◽  
Cellular Material ◽  
Nonlinear Material ◽  
Optimization Approach ◽  
Material Models

The objective of this work is to establish a cluster-based optimization method for the optimal design of cellular materials and structures for crashworthiness, which involves the use of nonlinear, dynamic finite element models. The proposed method uses a cluster-based structural optimization approach consisting of four steps: conceptual design generation, clustering, metamodel-based global optimization, and cellular material design. The conceptual design is generated using structural optimization methods. K-means clustering is applied to the conceptual design to reduce the dimensional of the design space as well as define the internal architectures of the multimaterial structure. With reduced dimension space, global optimization aims to improve the crashworthiness of the structure can be performed efficiently. The cellular material design incorporates two homogenization methods, namely, energy-based homogenization for linear and nonlinear elastic material models and mean-field homogenization for (fully) nonlinear material models. The proposed methodology is demonstrated using three designs for crashworthiness that include linear, geometrically nonlinear, and nonlinear models.

Structural optimization concept for the design of an aluminium control arm

2003 ◽  
Vol 217 (8) ◽  
pp. 647-656 ◽  
Author(s):  
Dong-Chan Lee ◽  
Jeong-Ick Lee
Keyword(s):  
Topology Optimization ◽  
Structural Optimization ◽  
Conceptual Design ◽  
High Performance ◽  
Optimization Design ◽  
Low Cost ◽  
Optimal Layout ◽  
Mass Reduction ◽  
Reinforcement Structure ◽  
Structural Rigidity

The development of a mechanical structure needs to be started from the conceptual design with low cost, high performance and quality. In this regard, the structural and topological shape of the system has a great e ect on the performance in terms of rigidity, strength and mass reduction. In this paper, optimization design methodologies in the design stages of an aluminium control arm for a suspension are presented. First, using topology optimization, the optimal layout and the reinforcement structure are obtained, and then the detail designs are carried out using shape optimization for the structural rigidity and strength. In comparison with a steel control arm, the mass reduction is 50 per cent and the structural rigidity and strength are improved up to 40 per cent.

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