807 き裂を有するはりのハイブリッドGAを用いたき裂同定(オーガナイズドセッション : 計算力学と構造設計)

概要

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When a crack exists in a beam, the natural frequencies of the beam decrease. Using this phenomenon, researches on identification of the crack location and depth of a beam are developed by many investigators. This paper also describes a study on an inverse analysis method to identify the crack location and the depth of Bernoulli-Euler beam by genetic algorithm and quasi-Newton method. The crack is simulated by an equivalent rotational spring model. In order to identify the crack location and depth of the beam from frequency measurements, objective function that consists of the sum of square errors of frequencies is formed. After determining the initial values of the objective function by genetic algorithm, quasi-Newton method is used to search for the minimum value of the objective function.
社団法人日本機械学会の論文
2001-09-20