Розроблення моделі надійності для аналізу причин непрацездатності гідравлічної станції зі спареними насосами
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НТУ "ХПІ"
Abstract
Запропоновано математичну модель надійності гідравлічної станції із спареними насосами. Модель адекватно враховує вплив перерозподілу навантаження між спареними насосами на ймові-рнісні характеристики причин непрацездатності такої системи. Для математичного опису надій-ності застосовано динамічне дерево відмов, а для кількісного аналізу розщеплена однорідна марковська модель.
The mathematical reliability model for hydraulic station with coupled pumps is proposed. The model adequately takes into account impact of load-sharing for coupled hydraulic pumps on failure cause probability characteristics of such system. For reliability formalization a dynamic fault tree is used. System failure is occurred in three cases. The first case is electrical motor failure, the second — pump couple failure, and the third — safety valve failure. Pump couple failure occurs in the case of both pumps failure is occurs. If one pump is fault, then other one operates under overload with determined rate. Component life is distributed by Weibull and repairing time is distributed by exponentially. Based on the dynamic fault tree the split homogeneous Markov model of system is constructed. This model is used for failure cause probability characteristics calculation. The most probable failure cause is determined. Impact of overloadrate of pumps on probability characteristics is analyzed.
The mathematical reliability model for hydraulic station with coupled pumps is proposed. The model adequately takes into account impact of load-sharing for coupled hydraulic pumps on failure cause probability characteristics of such system. For reliability formalization a dynamic fault tree is used. System failure is occurred in three cases. The first case is electrical motor failure, the second — pump couple failure, and the third — safety valve failure. Pump couple failure occurs in the case of both pumps failure is occurs. If one pump is fault, then other one operates under overload with determined rate. Component life is distributed by Weibull and repairing time is distributed by exponentially. Based on the dynamic fault tree the split homogeneous Markov model of system is constructed. This model is used for failure cause probability characteristics calculation. The most probable failure cause is determined. Impact of overloadrate of pumps on probability characteristics is analyzed.
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Citation
Стефанович Т. О. Розроблення моделі надійності для аналізу причин непрацездатності гідравлічної станції зі спареними насосами / Т. О. Стефанович, В. М. Оксентюк, С. В. Щербовських // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Темат. вип. : Механіко-технологічні системи та комплекси. – Харків : НТУ "ХПІ". – 2015. – № 21 (1130). – С. 139-147.