A doubly asymptotic open boundary element for hydrodynamic pressure wave analysis based on the ABAQUS and its application

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (10) : 38-42.

GAO Yichao1,2,MEI Zhen1,2

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Abstract

The high order doubly asymptotic open boundary can converge to the exact solution over the whole frequency range.It has high computational accuracy and efficiency.Based on the user element subroutine interface UEL offered by the ABAQUS, a doubly asymptotic open boundary element for hydrodynamic pressure wave analysis was developed and the time-domain coupled analysis model by combining the finite element method and doubly asymptotic open boundary was realized.The stiffness matrix and damping matrix of the doubly asymptotic open boundary element are both constant matrices, which need to be solved only once during the analysis procedure.To increase the computational efficiency, they can be solved in advance and read into the ABAQUS during the analysis.The proposed element was verified by numerical examples and applied to the dynamic dam-reservoir interaction analysis.The numerical results demonstrate that the proposed user element is of good numerical stability and high computational accuracy.It is applicable to the seismic response analysis of realistic dams.

Key words

hydrodynamic pressure / transmitting boundary / ABAQUS / doubly asymptotic

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GAO Yichao1,2,MEI Zhen1,2. A doubly asymptotic open boundary element for hydrodynamic pressure wave analysis based on the ABAQUS and its application[J]. Journal of Vibration and Shock, 2019, 38(10): 38-42

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