Renewal Methods of Construction Machinery According to Technical and Economic Indicators

Abstract

This article presents the results of an investigation for a new method to form sets of construction machinery. The model for optimizing the set of construction machinery implies the possibility to consider the following: the influence of the quality of operation onto the technical state of the machinery, which is characterized by the readiness factor; costs and reliability of the purchased equipment, new and the used one; influence of capital overhauls; selling machinery and purchasing new one at a higher price; decommissioning old equipment; accompanying economical losses, which is a concealed form of insuring against insufficient reliability of the equipment; optimizing the service life along several criteria – minimum investment, maximum profit, specified level of reliability, period of repayment. This method for optimizing the age structure of the construction machinery set is based on using the method of linear programming. Practical recommendations are also included.

Процесс Формирования Эффективности Эксплуатации Транспортно–технологических Машин

“…Загрузку парка машин работой обеспечивает система коммерческой эксплуатации (СКЭ). Таким образом, ПМ, СТЭ и СКЭ -являются основными подсистемами ПЭСМ [1]. Их взаимодействие показано на рисунке 1.…”

“…Модель формирования наработки парка машин. Наработка машин является главным источником выручки [формула (2)], и, следовательно, прибыли [формула (1)]. Для создания модели формирования наработки следует рассмотреть структуру календарного времени Т машины (парка машин) (рис.…”

Optimizing the service life of plant machinery and vehicles using information system for management of engineering status

“…Mathematical models for optimization of service life of machinery were developed at the Department of Plant Machinery and Vehicles of the Saint Petersburg State University of Architecture and Civil Engineering (SPSUACE) (Repin, 2015;Repin et al 2012). Application of these models is performed by integrating them with one of the best Russian EAM systems -TRIM software -designed by specialists of Scientific Production Enterprise "SpetsTek" (Saint Petersburg) and adapted together with specialists of the SPSUACE for plant machinery and vehicles (Repin et al, 2008).…”

Untitled

“…Many researchers (Bujaczek, 2013;Repin and Evtjukov, 2015;Protasov and Nikolaychuk, 2011;Chernyavsky and Shadchin, 2010) propose to assess the reliability of machines with the help of the queuing theory (QT). A scheme of change in states of elements replaced by the time to failure, drawn up according to QT methods, is presented in Figure 1.…”