Finite element modeling method for shell and beam strengthening structure
A technology that strengthens the structure and modeling method. It is applied in special data processing applications, instruments, and electrical digital data processing. It can solve problems such as large amount of calculation and cumbersome modeling process, and achieve accurate finite element modeling and cumbersome solution process. , the effect of reducing the calculation scale
Active Publication Date: 2012-12-26
中国航天科工集团第二研究院二十三所
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[0003] The purpose of the present invention is to provide a finite element modeling method for plate shell and beam reinforced structures, which solves the problems of cumbersome modeling process of solid or plate shell elements and large amount of calculation in the past
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[0022] A finite element modeling method for plate shell and beam reinforced structures, the specific steps of which are as follows:
[0023] The first step is to build a finite element modeling system for plate shell and beam reinforced structures
[0024] The finite element modeling system of plate shell and beam reinforced structure includes: CAD model processing module, finite element mesh division module, node editing module and unit editing module. The CAD model processing module is used to simplify the CAD model, the finite element meshing module is used to divide the grid, the node editing module is used to merge nodes, and the unit editing module is used to set the unit offset.
[0025] The second step CAD model processing module simplifies the CAD model
[0026] The plate shell and beam reinforcement structure is composed of plate shell A1, plate shell B2 and beam A3, beam B4, and beam C5 sandwiched between them. The plate shell and beam are fixed by welding or bondi...
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The invention discloses a finite element modeling method for a shell and beam strengthening structure. The method comprises the following specific steps of: constructing a finite element modeling system for the shell and beam strengthening structure, wherein the finite element modeling system comprises a computer-aided design (CAD) model processing module, a finite element meshing module, a node editing module and a unit editing module; simplifying a shell into a spatial curved surface and simplifying a beam into curved lines by the CAD model processing module; meshing the curved surface by the finite element meshing module by adopting a shell unit, and meshing a curved line A, a curved line B and a curved line C by adopting a beam unit; merging three nodes at a solid centre of a circle into a node for simulating the connection of the shell and the beam by adopting a node editing module; and respectively setting unit node bias for the shell units which belong to a shell A(1) and a shell B (2) by the unit editing unit. Therefore, the finite element modeling for the shell and beam strengthening structure is realized. By the method, the quick, convenient and accurate finite element modeling for the shell and beam strengthening structure is realized.
Description
technical field [0001] The invention relates to a finite element modeling method, in particular to a finite element modeling method of plate shell and beam reinforced structures. Background technique [0002] The plate shell and beam strengthening structure is to sandwich multiple beams between two plate shells. The past finite element modeling method is solid element modeling or plate shell element modeling, that is, the plate shell is modeled with solid elements or plate shell elements. The main steps of meshing with the beam structure are: divide the plate and shell into solid elements or plate and shell elements; divide the beam into solid elements or plate and shell elements; use node coupling or multi-point constraints to associate the plate shell and beam elements . This kind of modeling process is cumbersome and has a large amount of calculation, which is not conducive to dealing with complex problems. Contents of the invention [0003] The purpose of the present...
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Inventor 贺李平
Owner 中国航天科工集团第二研究院二十三所