MIXED VARIATIONAL FORMULATION OF FINITE-ELEMENT ANALYSIS OF ACOUSTOELASTIC SLOSH FLUID-STRUCTURE INTERACTION

被引：33

作者：

FELIPPA, CA

OHAYON, R

机构：

[1] Department of Aerospace Engineering, Center for Space Structures and Controls, University of Colorado, Boulder

[2] Office National d'Études et de Recherches Aérospatiales

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 1990年 / 4卷 / 01期

关键词：

D O I：

10.1016/0889-9746(90)90036-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A general three-field variational principle is obtained for the motion of an acoustic fluid enclosed in a rigid or flexible container by the method of canonical decomposition applied to a modified form of the wave equation in the displacement potential. The general principle is specialized to a mixed two-field principle that contains the fluid displacement potential and pressure as independent fields. This principle contains a free parameter α. Semidiscrete finite-element equations of motion based on this principle are displayed and applied to the transient response and free-vibrations of the coupled fluid-structure problem. It is shown that a particular setting of α yields a rich set of formulations that can be customized to fit physical and computational requirements. The variational principle is then extended to handle slosh motions in a uniform gravity field, and used to derived semidiscrete equations of motion that account for such effects. © 1990 Academic Press Limited.

引用

页码：35 / 57

页数：23

共 19 条

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