Finite element analysis-based submodel rapid analysis method

Abstract

The invention belongs to the technical field of computer aided design, and particularly relates to a method for rapidly analyzing a submodel based on finite element analysis. According to the rapid sub-model analysis method provided by the invention, a fitting technology, a surface node search technology and an interpolation technology based on a neural network are introduced, and a sub-model analysis process is optimized. Neural network fitting and pre-processing can be carried out at the same time, extra time is not needed, after the result file is obtained, a CAD model is not needed any more, and setting of all sub-models can be achieved in the result file. Meanwhile, the user can select any multi-attention area at will and perform sub-model analysis at the same time. In addition, the method is universal to various mainstream FEA software, and only appropriate adjustment needs to be carried out in the aspect of a data interface. Finally, the application scene and the analysis efficiency of the sub-model technology are expanded.

Description

technical field [0001] The invention belongs to the technical field of computer-aided design, and in particular relates to a fast analysis method of a sub-model based on finite element analysis. Background technique [0002] Finite Element Analysis (FEA, Finite Element Analysis) uses mathematical approximation methods to simulate real physical systems (geometry and load conditions), using simple and interacting elements (ie units), you can use a limited number of unknown quantities To approach the real system with infinite unknowns. In finite element analysis, local models can be studied on the basis of the analysis results of the global model. Determine the maximum response area under the excitation load through the initial global model analysis and calculation, intercept the local attention area model and refine its grid, interpolate the global model node displacement result field to the model boundary node after the refined grid, And re-calculate the finite element, so ...

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a method for rapid analysis of sub-models based on finite element analysis, the purpose of which is to solve the problem of using sub-model analysis in the prior art to subdivide the original CAD model to obtain the concerned When the shape of this region is complex or the number of regions of interest in this model is too large, it will take a lot of time in the subdivision process; and the solver needs to check the data type when calculating the sub-model, and the calculation time is relatively long. long technical question

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