|Table of Contents|

Study on fluid-structure coupling modal simulation of liquid filling container(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2015年01期
Page:
90-97
Research Field:
研究与设计
Publishing date:

Info

Title:
Study on fluid-structure coupling modal simulation of liquid filling container
Author(s):
XUE Jie;  HE Shang-long;  DU Da-hua;  LI Feng
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
fluid-structure coupling;  coupled acoustic-structural analysis;  virtual fluid mass;  modal analysis
PACS:
V434-34
DOI:
-
Abstract:
Two conventional algorithms for fluid-structure coupling modal analysis of the liquid filling containers are mainly introduced in this paper. They are coupled acoustic-structural analysis (CASA) and virtual fluid mass (VFM). It points out the relation and difference between the two algorithms through the theory analysis. VFM adopts the incompressible liquid form that appears in CASA, in which some progress has been made, namely, the effect of the fluid is incarnated completely by virtual mass matrix, and the virtual mass matrix of the liquid is obtained by the boundary element method (BEM) with the property of analytic solution. Based on the study on the dry modes and the wet modes of one ringent box, the varying laws of influence of the liquid on the structure modal characteristics are revealed. At the same time, the study result indicates the well-regulated otherness between the wet modes results from the two methods (VFM and CASA): with increase in vibration frequency, not only the effect of liquid on the structure dynamic characteristic decreases gradually, but also the difference between the two methods decrease.

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