Model state creation method based on characteristic suppression in finite element modeling

Abstract

The present invention provides a restraining model generating method based on the characteristics in finite element modeling, characterized in that the providing unreduced model by users; identifying reducible characteristics in the unreduced model; determining numbers of unreduced characteristics; acquiring sensitive value of the unreduced characteristics after being suppressed representing model lateral error by the sum of all suppressed characteristics sensitive values; evaluating unit amount of the model after being grid divided; selecting the model according to the lateral error of the model and the unit amounts Ne, acquiring simplified model code; a simplified model corresponding to the simplified model code generated by suppress characteristics method. The invention achieves that each characteristic changes in the model objectively evaluates the finite element result sensibility, establishes sensibility measurement system of results by choosing and changing of each element in the model, and gives an precise evaluating method of the model time consumption, generating model on the basis.

Description

technical field [0001] The invention relates to a computer-aided modeling method, more specifically a method for generating model states applied in finite element modeling. Background technique [0002] Computers play an increasingly important role in improving social productivity, especially computer-aided design CAD, aided engineering CAE, and aided manufacturing CAM are becoming increasingly mature and popular in the industry, which greatly improves the efficiency of industrial design and production. The use of finite element analysis and optimization processing based on finite element analysis can improve the structural design of the product, so that the product has the most reasonable structure under the condition of satisfying the strength and rigidity. [0003] Finite element analysis (FEA) was first applied in the field of continuum mechanics in the 1950s, such as in the analysis of static and dynamic characteristics of aircraft structures, and was soon applied to an...

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Problems solved by technology

However, this method has two disadvantages: first, the relationship between the error ratio, feature volume ratio, and the distance between the feature and the load surface is only obtained from the data of a limited number of experiments, which is random; second, there is no guarantee that the error will be affected Comprehensiveness of element summary

In step (e), according to the average volume ratio of the features contained in the model state V ‾ = 1 n Σ V i To estimate the time consumed by the model state, it obviously lacks objectivity and accuracy

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