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A screening method based on rbf mesh deformation interpolation sequence

A grid deformation and screening method technology, applied in the direction of instrumentation, geometric CAD, calculation, etc., can solve the problems of slow error convergence speed and large calculation amount of grid deformation, and achieve fast error convergence speed, high screening efficiency, and guaranteed interpolation The effect of precision

Active Publication Date: 2018-10-26
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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Problems solved by technology

[0004] In order to solve the problem of large amount of calculation of mesh deformation in the background technology and slow convergence speed of errors in screening RBF interpolation sequences by greedy algorithm, the present invention proposes a grid based on RBF that can speed up the convergence speed of interpolation errors and improve the screening efficiency of interpolation sequences Screening Method of Deformed Interpolation Sequence

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  • A screening method based on rbf mesh deformation interpolation sequence
  • A screening method based on rbf mesh deformation interpolation sequence
  • A screening method based on rbf mesh deformation interpolation sequence

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[0032] Under the requirement of interpolation precision, simplifying RBF interpolation sequence is the most important technical means to reduce the calculation amount of RBF grid deformation. On the basis of the initial interpolation sequence, the nodes with large interpolation error of RBF grid deformation are selected on the deformation boundary surface as the base point of the sequence, and the amount of interpolation error is gradually reduced until the set error accuracy is reached. The method of the invention aims to speed up the error convergence speed, improve the iterative screening efficiency of RBF grid deformation, and establishes an interpolation sequence screening method in which an extreme value algorithm is combined with a greedy algorithm.

[0033] Attached below figure 1 The concrete description to the inventive method is as follows:

[0034] 1) Build the RBF mesh deformation module;

[0035] Among them, the grid of the RBF grid deformation module is used f...

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Abstract

The invention belongs to the technical field of numerical simulation of computational grid generation of computational fluid mechanics, and specifically relates to a screening method of interpolating sequences based on RBF grid deformation. The method comprises the following steps of: 1, building a RBF grid deformation module; 2, screening initial interpolating sequences; 3, calculating an interpolation error; 4, searching an extremum value of the interpolation error delta i through an extremum algorithm; 5, screening a RBF interpolating sequence. In the method provided by the invention, efficiency of screening the interpolating sequences is improved by means of combination of the extremum algorithm and a greedy algorithm, the extremum value of the interpolation error is searched in screening iteration, an extremum value point of which the error is greater than a threshold value is screened and added into the sequence, and thus, fast simplification of the radial basis function interpolating sequences is realized.

Description

technical field [0001] The invention belongs to the technical field of numerical simulation calculation grid generation of computational fluid dynamics, and in particular relates to a screening method based on RBF grid deformation interpolation sequence. Background technique [0002] The automatic generation of computational mesh is an important aspect of the pre-processing of numerical simulations such as aircraft aerodynamic shape design optimization and aeroelasticity. At present, mesh deformation technology is often used in engineering applications to realize the automatic generation of optimized configuration and aeroelastic deformation body-fitted mesh. The grid deformation technology enables the calculation grid to accurately reflect the shape change of the aircraft by performing translation, rotation, and torsion deformation operations on the calculation grid under the premise of grid topology consistency. From the comparative analysis of mesh applicability, deformat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/367Y02T90/00
Inventor 李中武周磊梁益华
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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