不特定荷重を考慮した構造物の最適形状設計 : 多項式系による形状表現とクレーンフック設計への適用

概要

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The main topic of this study is a shape design of structure considering various load conditions. In order to evaluate such a performance, we formulate a criterion based on the norm of the stiffness matrix of the structure to be designed. A shape design of crane-hook is introduced as an example. We formulate a multi-objective optimization problem based on an FEM analysis. The displacement at the specified force applying point, the ratio between the total displacement against various load conditions and the structural volume of the crane-hook are adopted as the evaluation items to be minimized. The cross-section and the contour shape are adopted as the design variables. Continuous change of these design variables is expressed in terms of orthogonal polynomials and the Fourier series. The Particle Swarm Optimization (PSO) is used as the optimization method. The obtained crane-hook design has a taperd shape similar to those of existing designs.
2010-10-25