共振周波数を用いた異方性弾性定数の同定に関する境界要素解析 : 遺伝的アルゴリズムを用いた数値シミュレーション

概要

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Resonant ultrasound spectroscopy (RUS) is widely used to evaluate the characteristics of small solid specimens like superconductor of a single crystal or anisotropic materials of fiber reinforced composites, for example. The elastic moduli of the solid body can be determined by measurement of the resonant frequencies exited by a pair of Piezo-electronic transducer. In this paper, a numerical technique for the determination of the elastic constants in RUS testing is discussed. An alternative evaluation function for the search algorithm of the elastic moduli is employed, and boundary element analysis is applied to compute the eigenvalue of the 3 dimensional vibration on the solid body. Furthermore, genetic algorithm is introduced to avoid some difficulties on the identification process for the anisotropic material. Some numerical simulations for the steel blocks, single crystal and CFRP laminate are conducted to demonstrate the effectiveness of the present method.
一般社団法人日本機械学会の論文
2004-04-25