Aeroelastic structure coupling optimization method based on self-adaptive point adding proxy model

Abstract

The invention discloses an aeroelastic structure coupling optimization method based on a self-adaptive point adding proxy model, and the method comprises the steps: firstly considering the parameter uncertainty and the model uncertainty, carrying out the quantification of the uncertainty, and providing a self-adaptive intelligent point adding criterion based on a Kriging proxy model, the maximum stress of the aircraft structure and the upper and lower boundaries of the flutter speed are obtained, and then the aircraft structure is optimally designed by considering the structural strength constraint condition and the aeroelasticity constraint condition based on the self-adaptive point adding agent model. According to the method, the number of times of finite element analysis and aeroelasticity analysis in the aircraft structure optimization process is reduced, the calculation amount is reduced, the optimization efficiency is improved, and a new thought is provided for aircraft structure optimization design.

Description

technical field [0001] The invention relates to the field of aeroelastic structure coupling optimization, in particular to an aeroelastic structure coupling optimization method based on an adaptive point addition agent model. Background technique [0002] Aeroelastic problems widely exist in the process of aircraft design. Under the action of aerodynamic load, the structure of the aircraft will deform and vibrate, and the deformation and vibration of the structure will in turn affect the size and distribution of the aerodynamic load on the aircraft. the same aeroelastic problem. Aeroelastic problems are mainly divided into two categories. One is to study the displacement and deformation of elastic bodies under aerodynamic loads, which is called static aeroelastic problems; the other is to study the dynamic response of elastic bodies under aerodynamic loads, which is called dynamic aeroelastic problems. Resilience issues. [0003] The flutter phenomenon belongs to the prob...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the deficiency that the existing proxy model method cannot realize adaptive point addition, and to provide an aeroelastic structure coupling optimization method based on the adaptive point plus proxy model, which fully considers the practical engineering problems Ubiquitous parameter uncertainty and model uncertainty, based on the upper and lower confidence boundaries of the Kriging proxy model, adaptively add sample points, and update the proxy model to obtain the upper and lower bounds of the maximum stress and flutter velocity of the aircraft structure, and at the same time Considering the strength constraints and aeroelastic constraints comprehensively, the aircraft structure is optimally designed

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