Expert trend identification of structural stability
DOI:
https://doi.org/10.30838/J.PMHTM.2413.261218.42.564Keywords:
structural stability, correct task, expert system, trend, knowledge base,Abstract
Abstract. Formulation of the problem. Luck of a unified concept, which identified integral criteria – structural stability of the static system, caused by the existing incompleteness of his formal representations, what justifies and initiate research of this system. Identification of the trend of structural stability. Quantification values of this function using two-digit logic, representing either the integrity of the structure of the object or its destruction is impossible, because it leads the task to conditionally correct. Relatively small changes, for example, of some technological parameter, changing structural stability of the identification object, what is not fixing by two-digit logic. In this connection, regularization of the named task is permissible through the use of an expert system that includes a specialized knowledge base. For the practical substantiation of the approach to determining structural stability, a metal was chosen (rolled from low carbon low alloy steel Ст3пс steel), whose reference points were assigned in the range of characteristics qualities limited by normative documents: ultimate strength - sв = 370...490 MPa; yield strength - sТ = 205...245 MPa; hardness - HRB = 62...70. Based on the analysis of the influence of synergistically interacting variables and the resulting equation, the trend of structural stability is determined. The significance of the work lies in establishing the trend of the structural stability of the object of identification, which allows predicting the values of the parameters that determine it. Conclusions and recommendations. An algorithm for determining the trend of parameters, according to which the structural stability of the object of identification is changed, is given: 1. Establishing his expert identification; 2. Determination of the working area of probabilistic assessments that establish the trend of structural stability and its quantification; 3. Establishing a trend of structural stability.
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