変位形流体要素の軸対称スロッシング問題への適用性検討(機械力学,計測,自動制御)

概要

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In the sloshing analysis of liquid storage tanks by the finite element method, the displacement based fluid element based on the Lagrangian formulation is widely used in two and three dimensional problems. On the other hand, it has not been reported the application to the axisymmetric problem. This paper presents the applicability of the displacement based fluid element to the axisymmetric sloshing problem. The eigenvalue of elemental stiffness matrix is analyzed in order to investigate the characteristics of the rotational stiffness to the compressibility of the fluid. As a result, this method is found to be difficult to apply to the axisymmetric problem. However, it gives the highly precise response solutions if the sloshing modes are only taken into consideration.
2010-07-25