鋼材パネルダンパーの開口部形状最適化

Abstract

A method is presented for shape optimization of openings of steel panel dampers. Cyclic elasto-plastic response properties are evaluated using finite-element analysis with solid elements. The shapes of boundary and openings are modeled using the level set function formulated with Bezier surface and Gaussian function. The design parameters are discretized into integer variables, and a local search is used for finding approximate optimal solutions. It is shown that the maximum plastic strain for specified cycles of loading is successfully reduced by shape optimization of openings. This way, the plastic energy dissipation property of steel panel before the maximum plastic strain reaches the specified value can be drastically improved.