A radial basis function (RBF) interpolation-based fluid-solid coupling interface data transfer method considering load uncertainty

An uncertainty, fluid-structure coupling technology, applied in the field of coupling interface data transfer in fluid-structure coupling analysis, which can solve problems such as rare data transfer of fluid-structure coupling interface, structural damage, structural analysis and design influence
CN109446471AActive Publication Date: 2019-03-08BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2019-03-08

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Abstract

The present invention discloses a radial basis function (RBF) interpolation-based fluid-solid coupling interface data transfer method considering load uncertainty. The method considers the fluid domain uncertainty input in the fluid-solid coupling interface data transfer, the interval representation of load uncertainty is constructed, and the radial basis function with uncertainty is established.Based on the radial basis function (RBF) interpolation, the definite solution conditions of the coefficients to be solved are constructed. Furthermore, the uncertain undetermined coefficients are solved by the definite solution conditions of the physical quantities in the fluid domain of the fluid-solid coupling interface. Finally, based on the relationship between physical quantities and undetermined coefficients, the mathematical expression of the data transfer matrix is derived, and the reliable prediction of the load range and upper and lower bounds in the solid domain is completed, so asto realize the effective transfer of the load uncertainty data of the fluid-solid coupling interface.
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Description

technical field

[0001] The invention belongs to the technical field of coupling interface data transmission in fluid-solid coupling analysis, in particular to a fluid-solid coupling interface data transmission method based on radial basis function interpolation considering load uncertainty, in order to realize fluid-solid coupling interface with uncertainty The effective transfer and credible prediction of data provide a feasible theoretical basis and technical support. Background technique

[0002] The research of data transfer method mainly focuses on the field of fluid-solid coupling in aerospace and civil engineering. Under the fluid load, the solid structure will produce displacement and velocity, and the deformation and movement of the solid structure will further affect the fluid load. Due to the great difference in grid type and density requirements of different physics calculation modules, the grids in the fluid domain and the solid domain do not match on the inter...

Claims

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