Reliability Assessment Method of Engineering Structure Based on Distributed Hybrid Cooperative Agent Model

Abstract

The present invention relates to a method for evaluating the reliability of engineering structure based on a distributed hybrid collaborative agent model, comprising the following steps: decomposing the engineering structure into multiple subsystem layers; selecting random input variables of engineering structure sub-objects in the lowest subsystem layer, And obtain the input samples of random input variables; establish the finite element model of the engineering structure sub-object in the lowest subsystem layer, and obtain the output indicators of each engineering structure sub-object; establish different types of agents for the engineering structure sub-object in the lowest subsystem layer Model, the proxy model with the highest precision is the optimal proxy model of the sub-object of the engineering structure at the lowest subsystem layer, and the optimal proxy model of the engineering structure is obtained layer by layer for reliability evaluation. Compared with the prior art, the present invention decomposes the overall complex structure into sub-objects distributed in multiple levels, reduces the number of sub-object parameters, reduces the degree of nonlinearity, and reduces the amount of calculation, which is conducive to improving the approximation accuracy and simulation speed of the engineering structure proxy model .

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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