構造変更時の動特性予測精度向上のための補正付き摂動法の提案: 第2報，実用モデルへの適用

摘要

第1報では，有限要素モデルを用いた音響・振動対策におけるパラメータスタディ，これを用いた多目的最適化等，多くの繰り返しを必要とする構造変更解析を効率化する新手法を提案した．本手法は，モード座標モデルによる構造変更後の動特性予測手法として従来利用されている摂動法に着目し，馬・萩原のモード法に基づく補正ベクトルを導入する．%Due to the large scale model of the finite element method in these days, a new method, which if available for the optimal analysis, is required to minimize the time for estimate of dynamic characteristics in changing the structure. In the first report, we focused on a perturbation method effective to this purpose. By finding the complementary vector appropriate to the structure change and the input using Ma-Hagiwara modal method, the accuracy is drastically improved even when the lower mode is truncated. In this report, we apply our new method to a practical model and the following 3 points become clear. First, our method is effective to the change of characteristic value of continuous element. Second, the prediction analysis for structure change becomes to be faster dramatically with high accuracy. Finally, our method contributes to the shortening of the design process in changing the design value in response to the target characteristic value.