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논문 기본 정보

자료유형
학술저널
저자정보
Nagashima, Toshio (Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University) Tsukuda, Takenari (Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University)
저널정보
테크노프레스 Coupled systems mechanics Coupled systems mechanics 제2권 제4호
발행연도
2013.1
수록면
389 - 410 (22page)

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초록· 키워드

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Three-dimensional Lagrangian fluid finite element is applied to seismic response analysis of an oil storage tank with a floating roof. The fluid element utilized in the present analysis is formulated based on the displacement finite element method considering only volumetric elasticity and its element stiffness matrix is derived by using one-point integration method in order to avoid volumetric locking. The method usually adds a rotational penalty stiffness to satisfy the irrotational condition for fluid motion and modifies element mass matrices through the projected mass method to suppress spurious hourglass-mode appeared in compensation for one-point integration. In the fluid element utilized in the present paper, a small hourglass stiffness is employed. The fluid and structure domains for the objective oil storage tank are modeled by eight-node solid elements and four-node shell elements, respectively, and the transient response of the floating roof structure or the free surface are evaluated by implicit direct time integration method. The results of seismic response analyses are compared with those by other method and the validation of the present analysis using three-dimensional Lagrangian fluid finite elements is shown.

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