Situation forecasting and decision-making optimization based on using markov finite chains for areas with industrial pollutions

Getun, Galina; Butsenko, Yuriy; Labzhinsky, Volodymyr; Balina, Olena; Bezklubenko, Irina; Solomin, Andriy

doi:10.32347/2410-2547.2020.104.164-174

Cited by 2 publications

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“…Якщо видалити і затяжки, а розпір передати масивним конструкціям нижче розташованих будов або фундаментам, тоді від ферм залишаться лише верхні пояси. Але з втратою ґрат робота верхніх поясів ферм, які перетворюються в арки, ускладнюється: розрахункові довжини арок для оцінки стійкості дорівнюють приблизно половині довжин їх дуг, тоді як у ферм вони дорівнюють лише довжинам панелей верхніх поясів; односторонні навантаженні від вітру і снігу викликають в арках згинальні моменти, а у ферм за вузлових прикладаннях навантажень всі елементи працюють на осьові зусилля стискання або розтягування [11,12]. Тому верхні пояси арок мають більші перерізи, ніж у ферм, а вибір між фермою або пологою аркою у кожному конкретному випадку вирішується з урахуванням архітектурних і техніко-економічних міркувань.…”

Section: принципи конструювання та особливості статичного розрахунку ...unclassified

Construction Principles and Features Static Calculation of Arches

Getun¹,

Bezklubenko²,

Balina³

et al. 2022

ПР

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The emergence of new types of structures and construction technologies related to them became the impetus for the search for new forms of buildings and structures and the development of a new understanding of space. Technical and economic calculations show that the area of coverings in buildings with large hall rooms, as a rule, exceeds the total area of other enclosing structures, and therefore the cost of coverings, taking into account installation work, is of predominant importance in construction estimates. Spatial forms of coverings of hall rooms significantly affect the architectural expressiveness of buildings, and therefore the issue of choosing forms, materials and rational constructive solutions of coverings is extremely relevant. The most important components of the covering systems of buildings and structures are supporting structures, which have unlimited possibilities of interpretation of forms and materials, can be hidden or open and turn into architectural elements. It is obvious that in the process of designing the coverings of buildings and structures, it is necessary to consider and analyze various options for their constructive solutions. The article analyzes the types of arches, their classification, the conditions of use as load-bearing structures of building coatings, as well as some problems of their static operation, which are related to the choice of form and conditions of their support and division into structural elements. The authors considered the problems of calculating and designing arches, choosing rational forms of arches that ensure the prevention of loss of their stability from the bending plane and a high aesthetic level. The main principles and methods of construction and static calculation of arches are presented.

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Section: принципи конструювання та особливості статичного розрахунку ...unclassified

Construction Principles and Features Static Calculation of Arches

Getun¹,

Bezklubenko²,

Balina³

et al. 2022

ПР

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“…Для решти схем під'єднання гідравлічних елементів приведених на рис.1 (б, в, г) моделі надійності функціональних дільниць гідроприводів отримуємо аналогічно, виходячи із умов збереження працездатності функціональної дільниці відповідної підсистеми. При цьому оцінку показників безвідмовності можна отримувати як за аналітичними виразами [3,4,10], так і за високоефективними в таких випадках методами статистичного (імітаційного) моделювання Монте-Карло, використаними для подібних задач та розглянутих в роботах [5,7].…”

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Stochastic models for ensuring parametric reliability of the construction machines

Getun¹,

Les'ko²,

Bezklubenko³

et al. 2021

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The solution of technical problems to ensure the working capacity is largely determined by the effectiveness of theoretical and applied developments in an area of estimation and prediction of their reliability indicators. An effective approach to the analysis of failures and the development of operability and parametric reliability models provides an opportunity to obtain more adequate models of reliability of hydraulic drives of machines, as they more fully take into account the specifics of the structure and functioning of the hydro drive elements of construction machines, their relationships and features of the formation of parameters failures. And this will allow to get more real and accurate results of estimation of reliability indicators of hydraulic drives of both construction and other hydraulic machines. They do not exhaust all possible variants of models that can take place when analyzing the reliability of hydraulic drives of machines, but at the same time they to a certain extent extend and refine the set of known reliability models. Specific in terms of formation of parametrical failures are such consistently connected in terms of the layout of hydraulic elements, as working sections of hydraulic distributors and hydraulic cylinders, which are part of the subsystems of GPs and form the so-called functional areas (FA). Reaching the FA limit is a compatible result of the combined random process of evolution of the volumetric efficiency JCUA these elements, and the technical condition of the FA is estimated to be generalized by the JCUA, which equals the product of the JCUA of consecutively connected elements: . In this case, the probability of maintaining the capacity of the FA will be: . The processing of diagnostic information and the study of the reliability of GPs in real conditions of their operation showed that the distribution of JCUD hydraulic elements with a sufficient degree of consistency can be described under several theoretical laws. It is considered when the JCUA sections of the hydraulic distributor and hydraulic cylinder are distributed by gamma distribution and exponential distribution. The use of the general methodological approach to the analysis of failures and the construction of models of operability and parametric reliability provides an opportunity to obtain more adequate models of reliability of hydraulic drives of machines, as they more fully take into account the specifics of the structure and functioning of the hydraulic drive elements, They don't exhaust all possible models that can take place when analyzing the reliability of hydraulic drives, but at the same time they are to some extent expanding and refining the range of already known models of reliability.

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Situation forecasting and decision-making optimization based on using markov finite chains for areas with industrial pollutions

Abstract: The paper proposes a methodology for modeling engineering-within-nature complex systems (further, "systems"), which will be helpful for researchers and operators of complex technical systems in predicting the emergencies using environmental monitoring systems.

Cited by 2 publications

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Construction Principles and Features Static Calculation of Arches

Construction Principles and Features Static Calculation of Arches

Stochastic models for ensuring parametric reliability of the construction machines

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