Probabilistic Analysis of Intermediate Floor Steel and Wooden Structures in the Old Urban Development Building

2014 ◽  
Vol 633-634 ◽  
pp. 1140-1147
Author(s):  
Vladimir Alekseevich Sokolov
Keyword(s):  
Information Theory ◽  
Urban Development ◽  
Probabilistic Analysis ◽  
Technical Condition ◽  
Probabilistic Methods ◽  
Technical Diagnostics ◽  
Structural Elements ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Wooden Structures

The article suggests an approach to determine structural elements technical condition, based on the mathematical probabilistic apparatus of technical diagnostics. Diagnostics are performed using probabilistic methods of complex technical systems conditions recognition. Probabilistic parameters are calculated according to Bayes’s rule. The paper shows a diagnostics example of intermediate floor elements and systems in the old urban development building. Both the suggested method and information theory methods are used during diagnostics.

scholarly journals Methods of analysis of possible states of the object diagnosis.

2021 ◽  
Vol 24 (1) ◽  
pp. 33-38
Author(s):  
VAZHYNSKYI A. ◽  
◽  
ZHUKOV S. ◽  
Keyword(s):  
Flaw Detection ◽  
Technical Condition ◽  
Measuring System ◽  
Diagnostic Tools ◽  
Technical Diagnostics ◽  
Information Measuring ◽  
Other Information ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Diagnostics System

The development of new methods of technical diagnostics is an important task aimed at improving the efficiency and safety of the operation of industrial equipment. Such methods are complexes of jointly used methods for obtaining diagnostic information, methods for extracting from it the actual data on the technical state of the diagnosed objects, and methods for organizing diagnostic processes. Complex technical systems are characterized by complex nonlinear interactions between their constituent elements, complex scenarios of causal relationships between hazardous, probabilistic events and processes occurring during their operation. These scenarios can be implemented in complex scenario trees. Features of technical diagnostics of complex technical systems are determined by the distinctive properties of failures in such systems and scenarios. The technical diagnostics system is an information-measuring system and contains sensors of controlled parameters, communication lines with an information collection unit, executive devices, devices for interfacing with other information-measuring and control systems. Methods of technical diagnostics serve as the basis for constructing such a system. The current level and prospects for the development of diagnostic tools, flaw detection and automated control open real possibilities of using methods of maintenance and repair of equipment by a technical condition. The greatest effect from the use of such a system is achieved when operating complex equipment, preventive repair of which is associated with high costs, and emergency repair.

Numerical methods in construction

2018 ◽  
Author(s):  
Владимир Чемодуров ◽  
Vladimir Chemodurov ◽  
Элла Литвинова ◽  
Ella Litvinova
Keyword(s):  
Numerical Methods ◽  
Differential Equations ◽  
Strain State ◽  
System Analysis ◽  
Dynamic Loads ◽  
Analytical Models ◽  
Building Structures ◽  
Structural Elements ◽  
Complex Technical Systems ◽  
Technical Systems

The monograph deals with the development of models of stress-strain state of structural elements, the study of the behavior of building structures under the influence of dynamic loads using differential equations; methods of discretization of analytical models of the functioning of building structures and design of complex technical systems (system analysis problems). It is intended for scientific and technical workers, it will be useful to students in the areas of training 08.03.01 and 08.04.01 "Construction".

ESTIMATION CRITERIA OF RELIABILITY AND TECHNICAL CONDITION OF HYDRAULIC ENGINEERING CONSTRUCTIONS

2011 ◽  
Vol 1 (2) ◽  
pp. 105-108 ◽  
Author(s):  
S. V EVDOKIMOV ◽  
T. V DORMIDONTOVA
Keyword(s):  
Technical Condition ◽  
Hydraulic Engineering ◽  
Complex Technical Systems ◽  
Technical Systems

Here are considered the basic estimation criteria of the reliability and technical condition of hydraulic engineering constructions. The basic methods of the estimation and calculation of the reliability of complex technical systems are analyzed. Conclusions are drawn and recommendations how to use these methods are offered with reference to hydraulic engineering objects and constructions.

scholarly journals On the classification of motive power failures

Dependability ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 12-19
Author(s):  
Yu. V. Babkov ◽  
E. E. Belova ◽  
M. I. Potapov
Keyword(s):  
Life Cycle ◽  
Markov Chains ◽  
Technical Condition ◽  
Transportation Systems ◽  
Probabilistic Methods ◽  
Railway Transportation ◽  
Structural Problems ◽  
Failure Classification ◽  
Technical Systems

The Aim of the article is to develop a motive power failure classification to enable substantiated definition of dependability requirements for motive power as a part of a railway transportation system, as well as for organizing systematic measures to ensure a required level of its dependability over the life cycle. Methods. The terminology of interstate dependability-related standards was analysed and the two classifications used by OJSC “RZD” for estimating the dependability of technical systems and motive power were compared. The dependability of railway transportation systems is studied using structural and logical and logical and probabilistic methods of dependability analysis, while railway lines are examined using the graph theory and the Markov chains. Results. An analysis of the existing failure classifications identified shortcomings that prevent the use of such classifications for studying the structural dependability of such railway transportation systems as motive power. A classification was developed that combines two failure classifications (“category-based” for the transportation process and technical systems and “type-based” for the motive power), but this time with new definitions. The proposed classification of the types of failures involves stricter definitions of the conditions and assumptions required for evaluating the dependability and technical condition of an item, which ensures correlation between the characteristics of motive power and its dependability throughout the life cycle in the context of the above tasks. The two classifications could be used simultaneously while researching structural problems of dependability using logical and probabilistic methods and Markov chains. The developed classification is included in the provisions of the draft interstate standard “Dependability of motive power. Procedure for the definition, calculation methods and supervision of dependability indicators throughout the life cycle” that is being prepared by JSC “VNIKTI” in accordance with the OJSC “RZD” research and development plan. Conclusion. The article’s findings will be useful to experts involved in the evaluation of motive power dependability.

scholarly journals Risk-Based Approach in Assessing the Technical Condition of Foundations of Bridge Structures

2021 ◽  
Vol 18 (6) ◽  
pp. 64-73
Author(s):  
E. V. Kaimov
Keyword(s):  
Mathematical Model ◽  
Technical Condition ◽  
Technical State ◽  
Probabilistic Methods ◽  
Transport Infrastructure ◽  
Practical Significance ◽  
Structural Elements ◽  
Functional Quality ◽  
Bridge Structures

The objective of this article is to consider the use of predictive mathematical models for assessing risks associated with a critical loss of values of functional quality of bearing structural elements (foundations) of bridge structures using methods of probabilistic analysis and forecasting the risks of reducing of values of indicators of the technical state of structural elements.The research results in development of an algorithm and a mathematical model that characterise the features of the process of reducing of values of indicators of the technical condition of load-bearing structures during the service life cycle. The results of assessing the loss of functional quality of foundations obtained using this model are presented.The practical significance of the study relates to the possibility and expediency of using probabilistic methods for predictive assessment of the technical state of loadbearing structures. With the help of an appropriate mathematical model, it becomes possible to proceed with design rationale of indicators of functional quality of foundations of bridge structures.The need to improve regulatory provisions for design and forecasting of indicators of the technical condition of transport infrastructure objects is substantiated.

Knowledge representation in graph-models of complex technical systems

2020 ◽  
pp. 12-16
Author(s):  
Evgenia R. Muntyan
Keyword(s):  
Analytical Study ◽  
Level Structure ◽  
Graph Models ◽  
Level Data ◽  
Knowledge Formation ◽  
Different Types ◽  
Level Information ◽  
Complex Technical Systems ◽  
Technical Systems ◽  
Structure Of Knowledge

The article analyzes a number of methods of knowledge formation using various graph models, including oriented, undirected graphs with the same type of edges and graphs with multiple and different types of edges. This article shows the possibilities of using graphs to represent a three-level structure of knowledge in the field of complex technical systems modeling. In such a model, at the first level, data is formed in the form of unrelated graph vertices, at the second level – information presented by a related undirected graph, and at the third level – knowledge in the form of a set of graph paths. The proposed interpretation of the structure of knowledge allows to create new opportunities for analytical study of knowledge and information, their properties and relationships.

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