G100073 平均軸ひずみ測定の改良によるANCF梁要素の軸弾性力計算精度向上([G10007]機械力学・計測制御部門一般セッション(7):計測・測定)

概要

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This paper presents an improved evaluation of the axial elastic force in three-dimensional Bernoulli-Euler beam element based on the absolute nodal coordinate formulation. An accurate measure of mean axial strain for evaluating the axial elastic forces characterizes the presented formulation. The presented formulation evaluates the mean axial strain accurately by measuring the length of deformed beam element along its neutral axis instead of the straight-line distance between two element nodes. A comparison of the conventional formulations of the axial elastic force and the presented formulation is performed in numerical example which contains large bending deformation of flexible beam. As a result, it is verified that the presented formulation can express large deformation more accurately with smaller number of elements than the conventional formulation. Moreover, it is also verified that the presented formulation can avoid excessive increase in computing time to simulate the dynamic behavior of flexible beam.
一般社団法人日本機械学会の論文
2011-09-11