Approximate modeling method, device, equipment and medium for aircraft complex structure

Abstract

This application relates to an approximate modeling method, device, equipment and medium for aircraft complex structures. The method includes obtaining multiple sample data of the aircraft structure, and using the K-means clustering method to cluster each sample data; using the proportional distribution method to cluster The final samples are grouped, and the enhanced anisotropic radial basis method based on local density is used to construct a proxy model for the performance prediction of the aircraft structure according to the obtained multi-group cluster group samples; The verification method calculates the prediction error of the proxy model and calculates the root mean square error of all prediction errors; the root mean square error is used as the objective function and the anisotropic scaling coefficient is used as the design variable, and the anisotropic scaling coefficient is calculated according to the root mean square error. Optimize the process to obtain the target scaling factor corresponding to the smallest root mean square error; use the final high-precision performance prediction model to predict the performance of the aircraft structure. Performance indicates higher efficiency.

Description

technical field [0001] The present application relates to the technical field of aircraft design, in particular to an approximate modeling method, device, equipment and medium for complex aircraft structures. Background technique [0002] Due to the extreme working conditions and strict performance requirements of complex aircraft, its structure needs to have superior performance in terms of strength, stiffness and bearing capacity. The performance prediction of different structures of complex aircraft is one of the core and most difficult technologies in aircraft structure design. Its main task is to evaluate the bearing capacity of different structural forms by predicting the deformation and destruction of aircraft structures under operating loads. , so as to design a structure with light weight and high strength. [0003] At present, the commonly used methods for predicting the structural performance of complex aircraft mainly include: (1) Program simulation method. For ...

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Problems solved by technology

[0004] However, in the process of realizing the present invention, the inventors found that the aforementioned traditional method for predicting the structural performance of complex aircraft still has the technical problem of low efficiency in predicting the structural performance of the aircraft.

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