Method for modeling finite element of multi-frame integral structure component

Abstract

The invention discloses a finite element modeling method of the polybox integral structure aiming at the status that the method of building the polybox structural member finite element model has bad accuracy, low precision, large time and energy consumption and depends on the experienced analyzer. The method includes the steps: through initiatively simplifying the polybox structural member three-dimensional CAD model, extracting the frame tag architecture, building the finite element model base according to the frame tag architecture, then according to the actual form of the polybox structuralmember transmitting from the single frame to the multi-frame through transforming the working surface, forming the polybox structural member by dynamically splicing the single frame structural member, finally determining the polybox structural member finite element model. The method has the characteristics of high accuracy and good interactivity, which effectively shortens the modeling period ofthe finite element, not only embodies the computational mechanics theory of the polybox structural member, also makes the finite element model accurate than the CAD model in geometry.

Description

technical field [0001] The invention relates to a finite element analysis method of a multi-frame integral structure, in particular to a modeling method before finite element analysis of a multi-frame integral structure, specifically a finite element modeling of a multi-frame integral structure method. Background technique [0002] With the development of the aviation industry, the performance requirements of modern aircraft have been continuously improved, and the structural design of aircraft has undergone major changes. From the perspective of part structure, in order to reduce weight, the overall structural parts have been applied as much as possible in the new model, such as wings, integral wall panels, girders, bulkheads, etc. The multi-frame overall structural parts are not simply assembled from parts, but processed from a whole blank. Since the multi-frame integral structure has the characteristics of smooth appearance and light weight, it is better than the rivete...

AI Technical Summary

Problems solved by technology

However, using the interface between finite element software and CAD software to directly introduce the CAD model of multi-frame integral structural parts often leads to model changes and excessively large number of nodes, so that missing data affects the accuracy and precision of finite element analysis.

However, it takes a lot of time and energy to directly use finite element software to establish a finite element model of a multi-frame integral structure, and the process of abstracting the finite element model depends largely on experienced analysts

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