Analysis of mechanical structures of complex technical systems

Bozhko A.N.
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The work is devoted to the structural analysis of complex technical systems. Mechanical structures are considered, the properties of which affect the behavior of products during assembly, repair and operation. The main source of data on parts and mechanical connections between them is a hypergraph. This model formalizes the multidimensional basing relation. The hypergraph correctly describes the connectivity and mutual coordination of parts, which is achieved during the assembly of the product. When developing complex products in CAD systems, an engineer often makes serious design mistakes: overbasing of parts and non-sequential assembly operations. Effective ways of identifying these structural defects have been proposed. It is shown that the property of independent assembly can be represented as a closure operator whose domain is the boolean of the set of product parts. The images of this operator are connected and coordinated subsets of parts that can be assembled independently. A lattice model is described, which is the state space of the product during assembly, disassembly and decomposition into assembly units. The lattice model serves as a source of various structural information about the project. Numerical estimates of the cardinality of the set of admissible alternatives in the problems of choosing an assembly sequence and decomposition into assembly units are proposed. For many technical operations (for example, control, testing, etc.), it is necessary to mount all the operand parts in one assembly unit. A simple formalization of the technical conditions requiring the inclusion (exclusion) of parts in the assembly unit (from the assembly unit) has been developed. A theorem that gives an mathematical description of product decomposition into assembly units in exact lattice terms is given. A method for numerical evaluation of the robustness of the mechanical structure of a complex technical system is proposed.

Keywords: mechanical structure, structural analysis, computer-aided design, hypergraph structure model, lattice product model
Citation in English: Bozhko A.N. Analysis of mechanical structures of complex technical systems // Computer Research and Modeling, 2021, vol. 13, no. 5, pp. 903-916
Citation in English: Bozhko A.N. Analysis of mechanical structures of complex technical systems // Computer Research and Modeling, 2021, vol. 13, no. 5, pp. 903-916
DOI: 10.20537/2076-7633-2021-13-5-903-916
URL: http://crm-en.ics.org.ru/journal/article/3118/
Creative Commons License This work is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License.

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