A data transfer method for fluid-structure interaction interface considering load uncertainty

Abstract

The invention discloses a fluid-solid coupling interface data transmission method considering load uncertainty. This method considers the fluid domain load uncertainty input in the fluid-solid coupling interface data transmission, first constructs the interval representation of the load uncertainty, and establishes the radial basis interpolation function with uncertainty; based on the radial basis interpolation function, constructs The definite solution conditions for solving the undetermined coefficients are obtained; then, based on the definite solution conditions for the fluid domain physical quantities of the fluid-solid coupling interface, the calculation and solution of the undetermined coefficients with uncertainties is completed; finally, based on the relationship between the solid domain physical quantities and the undetermined coefficients The mathematical expression of the data transfer matrix is ​​derived from the relational formula, and the credible prediction of the load variation range and upper and lower bounds of the solid domain is completed, thereby realizing the effective transfer of the uncertain data of the fluid-solid coupling interface load.

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 considering load uncertainty, in order to realize the effective transmission and reliability of fluid-solid coupling interface data with uncertainty Letter prediction provides 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 interface. In order to realize the co...

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Problems solved by technology

[0005] In the actual engineering structure, the load on the structure inevitably has uncertainty caused by inaccurate prediction and calculation error, which will affect the analysis and design of the structure, and even cause safety accidents such as structural damage.

At present, the influence of load uncertainty has been widely considered in the field of structural analysis and optimal design, and the corresponding theory has been formed, but it is still rare in the data transfer of fluid-structure interaction interface

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