Parallel computing method for solving rate theoretical equation based on exponential time difference format

An equation and rate technology, applied in the field of parallel computing, to achieve the effect of solving fast and improving the speed of solving

Active Publication Date: 2020-01-07
CHINA INSTITUTE OF ATOMIC ENERGY +1
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Problems solved by technology

The method of the present invention can effectively solve the above-mentioned problems existing in the calculation of the existing material evolution phase field model

Method used

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  • Parallel computing method for solving rate theoretical equation based on exponential time difference format
  • Parallel computing method for solving rate theoretical equation based on exponential time difference format
  • Parallel computing method for solving rate theoretical equation based on exponential time difference format

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Embodiment Construction

[0030] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0032] The parallel calculation method for solving the rate theory equation provided by the present invention comprises the following two parts:

[0033] In the first part, the theoretical model of material defect rate is established, and the equations to be solved are determined.

[0034] The present invention adopts the rate theory to establish a model, because the rate theory has the advantages of fast calculation speed, high simulated damage dose and no space-time size limitation, etc., and can quickly predict the size distribution and number density of material microscopic defects. Specif...

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Abstract

The embodiment of the invention provides a parallel computing method for solving a rate theoretical equation based on an exponential time difference format. A physical microdefect simulation model isestablished based on a rate theory, and the rate theory has no space-time scale limitation, so that the advantages of the rate theory can be obviously reflected when microstructure evolution under a high damage dose condition is simulated, and then the exponential time difference format is used for solving the main equation, so that the solving result is better in accuracy and higher in precision.

Description

technical field [0001] The invention relates to computer physics simulation, in particular to a parallel computing method for solving rate theory equations based on an exponential time difference format. Background technique [0002] The exponential time-difference scheme retains the exponential integration operation, and the different treatment methods for the integration of the integral factor term and the nonlinear term of the objective equation over time. Exponential Time Difference uses polynomial interpolation to approximate nonlinear terms in the equation, and then performs exact integration on the resulting new integral terms. [0003] The reaction rate theory is based on the mesoscopic simulation of the mean field, and cannot carry out the atomic scale simulation, but needs the corresponding parameters provided by the atomic scale simulation. At low spatio-temporal scales, the rate theory ignores the spatial correlation and is difficult to simulate accurately. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/10G16C10/00
CPCG16C20/10G16C10/00
Inventor 王彦棡贺新福张鉴辛之夼豆艳坤聂宁明贾丽霞王珏杨文
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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