Earth and rockfill dam material constitutive model construction method based on deep learning and finite element unit method

Abstract

The invention discloses a material constitutive model based on deep learning and a finite element method, which belongs to the technical field of artificial intelligence and material constitutive models, and comprises the following steps: establishing a finite element model according to the size of an earth and rockfill dam material test piece, and inputting a stress-strain curve obtained by a compression test to perform finite element calculation; extracting real stress, strain and incremental data of the model to form a data set; learning the data set by adopting deep learning, and outputting deep learning model parameters; ccording to the deep learning model parameters, compiling a material constitutive subprogram, and constructing an earth and rockfill dam material constitutive model based on deep learning and finite element unit method. According to the construction method of the earth and rockfill dam material constitutive model, the used deep neural network can infinitely approach any continuous function, Therefore, the method can be used for constructing a complex nonlinear earth and rockfill dam material constitutive model, the deep neural network constitutive model is only based on test data, no hypothesis is made, the model is not affected by the shape of a stress-strain curve, and the model is more objective.

Description

technical field [0001] The invention relates to a material constitutive model based on deep learning and a finite element method, and belongs to the technical field of artificial intelligence and material constitutive models. Background technique [0002] When designing an earth-rock dam, it is necessary to predict the stress and deformation of the dam body through numerical analysis, so as to ensure the safe operation of the dam. In the stress and deformation analysis of the dam body, the constitutive model of the dam body material has a great influence on the calculation results. Therefore, it must Choose an appropriate constitutive model. [0003] The finite element method has been widely used as a powerful tool for analyzing engineering problems. In finite element analysis, the behavior of real materials is often approximated to the behavior of ideal materials deformed according to certain constitutive relations. Therefore, choosing an appropriate constitutive model to ...

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Problems solved by technology

However, the fitted constitutive function will inevitably lose part of the information contained in the data, and introduce errors and uncer

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