Reliability Modeling Method of DCFP System Considering Coupling Effect of Promotion and Accumulation

Abstract

The present invention provides a DCFP system reliability modeling method considering promotion and cumulative coupling effects, which includes the following steps: S1: Analyzing and determining the key failure mechanism and key failure mechanism of a certain component in the system that generates degeneration stress and impact stress during operation type; S2: Establish a soft failure model for the failure mechanism that produces degraded stress on the component; S3: Establish a reliability model for the failure mechanism component that produces impact stress on the component; S4: According to the mutual competition relationship between the soft failure and hard failure of the component, Obtain the reliability of the components; S5: Use the fault mechanism tree FMT model and the binary decision diagram BDD model to model the components S6: Use Matlab to perform reliability simulations on the mechanism model and the component model, and obtain the damage curve of the components as needed , hard failure threshold drop curves and component reliability curves.

Description

technical field [0001] The invention relates to the field of product reliability, in particular to a DCFP system reliability modeling method considering promotion and accumulation coupling effects. Background technique [0002] With the deepening understanding of reliability in engineering technology, users have put forward higher requirements for product reliability. In the field of reliability, reliability modeling and simulation are important methods to evaluate system reliability, and the use of fault physical models and fault behavior models frees reliability prediction from the shackles of mathematical statistics, enabling high-precision, low-failure data Product reliability can be more accurately simulated. However, due to the complexity of the system structure and environment, a system may experience different types of failures. From the mechanism, the failure can be divided into two types: degeneration failure and impact (or excessive stress) failure, which are al...

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Problems solved by technology

[0006] In order to overcome the defects of the prior art, the purpose of the present invention is to solve the problem that the existing modeling method cannot fully consider the coupling behavior of the fault mechanism in the DCFP system, and provide a theoretical description and mathematical construction for the coupling behavior relationship between the promotion of the fault mechanism and the cumulative effect. model, and combine the FMT model with the BDD model to model the coupling behavior of the failure mechanism to facilitate simulation analysis

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