Engineering structure reliability evaluation method based on distributed hybrid collaborative agent model

Abstract

The invention relates to an engineering structure reliability evaluation method based on a distributed hybrid collaborative agent model. The method comprises the following steps: decomposing an engineering structure into a plurality of subsystem layers; selecting a random input variable of the engineering structure sub-object in the lowest sub-system layer, and obtaining an input sample of the random input variable; establishing a finite element model of the engineering structure sub-objects in the lowest sub-system layer, and obtaining output indexes of the engineering structure sub-objects;building different types of agent models of the engineering structure sub-objects in the lowest subsystem layer, using the agent model with the highest precision as the optimal agent model of the engineering structure sub-objects in the lowest subsystem layer, obtaining the optimal agent model of the engineering structure upwards layer by layer, and performing reliability evaluation. Compared withthe prior art, the invention has the advantages that the overall complex structure is decomposed into the sub-objects distributed at multiple levels, the sub-object parameter amount is reduced, the nonlinear degree is reduced, the calculated amount is reduced, and the approximation precision and simulation speed of the engineering structure agent model are improved.

Description

technical field [0001] The invention relates to an engineering structure reliability evaluation method, in particular to an engineering structure reliability evaluation method based on a distributed mixed collaborative agent model. Background technique [0002] In many cases, complex mechanical structures are structural systems assembled from several components, such as gas turbine engine rotor structural systems, which are assembled from components such as main shafts, discs, and blades. The object of the mechanical structure analysis problem often involves multiple components. Therefore, the reliability design of the structural system is a complex analysis problem involving multiple objects and disciplines, and the amount of calculation is huge. If the structural system is directly optimized and designed as a whole, the general computing platform cannot bear such a large computing burden, and the design efficiency is unacceptable or even unrealizable. In order to improve ...

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Problems solved by technology

[0003] However, the proxy models of multiple levels of sub-objects involved in the reliability design of complex structures all have different characteristics, such as nonlinearity, parameter scale, explicit / implicit, time-varying, etc.

At present, the distributed cooperative agent model established based on an agent model cannot be well approximated for the analysis of multiple sub-objects with different characteristics, so that the reliability design accuracy and efficiency of different sub-models cannot be guaranteed.

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