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Method for applying deterministic finite element software to analysis of simple or large-size complicated structure containing interval parameters

A technology with interval parameters and complex structure, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problem of interval uncertainty finite element analysis software development that has not yet been reported, to avoid practical difficulties and meet reality. effect of demand

Active Publication Date: 2016-10-12
BEIHANG UNIV
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Problems solved by technology

However, the development and research data of finite element analysis software for interval uncertainty have not been reported so far

Method used

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  • Method for applying deterministic finite element software to analysis of simple or large-size complicated structure containing interval parameters
  • Method for applying deterministic finite element software to analysis of simple or large-size complicated structure containing interval parameters
  • Method for applying deterministic finite element software to analysis of simple or large-size complicated structure containing interval parameters

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Embodiment

[0073] 1. Simple structure

[0074]Simple structures in the present invention include trusses, steel frames, and single-type beam and plate structures. Figure 4 Several typical simple structures are given. In this section, a simple plate structure with holes is taken as an example to illustrate the specific application of the present invention.

[0075] 1.1 Structural parameters and model introduction

[0076] In order to understand more fully the characteristics of this invention and its applicability to engineering practice, the present invention uses Figure 5 The plate structure with holes shown in (a) is taken as an example to illustrate the specific application method of deterministic finite element software in structural analysis with interval parameters. Figure 5 (a) is a square flat plate fixed and constrained by the bottom edge (CD side). There is a large round hole with a radius of R=0.2m in the middle of the flat plate, and four small round holes with a radius...

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Abstract

The invention discloses a method for applying deterministic finite element software to the analysis of a simple or large-size complicated structure containing interval parameters. The method for applying the deterministic finite element software to the analysis of the simple or large-size complicated structure containing the interval parameters comprises the following steps of (1), establishing the geometric model of the structure; (2), inputting the interval parameters of the structure; (3), selecting a unit type, a material attribute and a boundary condition, and carrying out grid discretization on the structure; (4), getting back data in steps (2) and (3) to construct an input file of the deterministic finite element software; (5), running the deterministic finite element software to generate a vertex stiffness matrix and a vertex load vector; (6), converting the static problem of the structure containing the interval parameters into a series of sub-models of the static problem of a structure containing deterministic parameters according to a vertex solution theorem; (7), solving the sub-models by adopting a parallel algorithm, so as to obtain structural static responses of all the sub-models; (8), carrying out post processing on a result to obtain the upper bounds, the lower bounds and the mid-values of the structural static responses, and carrying out result visualization as required. By using the method for applying the deterministic finite element software to the analysis of the simple or large-size complicated structure containing the interval parameters, a succinct and effective method is provided for solving the interval analysis of the complicated structure.

Description

technical field [0001] The present invention mainly uses the existing deterministic finite element software to analyze the uncertainty propagation of simple or large-scale complex structural static problems with interval parameters, and specifically relates to a deterministic finite element software for simple or large-scale complex structures with interval parameters. Applied methods in analysis. Background technique [0002] With the rapid development of computer operating speed and computing technology, as an important means to improve design quality, shorten design cycle and reduce design cost, finite element method has received unprecedented attention in engineering design and analysis, and has become a solution to the calculation and analysis of complex structures. effective method. At present, relatively mature large-scale general-purpose finite element software has been formed, such as ANSYS, ABQAUS, NASTRAN, etc. [0003] However, the existing deterministic analys...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 邱志平吕峥王晓军朱静静陈贤佳许孟辉
Owner BEIHANG UNIV
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