シェル要素でモデル化された補強リブの構造変更シミュレーション(機械力学,計測,自動制御)

概要

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This paper proposes a method for improving the accuracy of prediction by the Structural Dynamics Modification (SDM) method for a thin plate structure with a rib stiffener when using experimental modal data. The mode shape expansion technique is incorporated into the SDM method to estimate the unmeasured degrees of freedom (dofs) data such as the rotational dofs. In the mode shape expansion process, for practical use, a submodel for the connection points and their periphery is used instead of the model of the whole structure. The numerical examples show that the proposed method produces the accurate prediction of modal data of the modified structure even when the transnational data only are measured. In the mode shape expansion process, the unmeasured dofs data are accurately estimated from the submodel by considering the boundary condition difference between the submodel and the real structure, though the reasonable set of measurement points is necessary to precisely express the exact mode shapes with the measured mode shapes.
一般社団法人日本機械学会の論文
2002-12-25