The article proposes a methodical approach to calculating the number of spare parts for weapon systems (WS) combat damage elimination and operability restoration based on criteria of minimization of spare parts cost, meeting the requirements of the spare parts, tools, supplies and materials, as well as timeliness of damaged WSs repair. The main points of the methodological approach (mathematical formalization of the task, basic calculation ratios, stages and order of calculation of spare parts stocks) are represented with a simplified scheme of the calculation of spare parts to ensure WS combat damage elimination and operability restoration. Probability of sufficiency and developed mathematical model for its calculation are used as a sufficiency indicator of spare parts to ensure WS combat damage elimination and operability restoration.
The article considers the mathematical model of maintenance of samples of armaments and military equipment according to the state with parameter control, for which the distribution of time of trouble-free operation of weapons in the form of Weibul's law is used as a model of failures. Probable physical distributions have a certain advantage over simply probable distributions, because their parameters can be determined on the basis of both statistical characteristics of failures and analysis of failures of the physical process. In addition, diffusion distribution laws, such as diffusion-monotone and diffusion-nonmonotonic distributions, are now the most relevant. These facts have significant practical value, which determines the relevance of the research. Also, the article considers the dependences of the coefficient of technical use of the object on different characteristics of the service system and the object itself are determined. For the mathematical description of the processes inherent in the maintenance system, the apparatus of semi-Markov random processes in the classical representation is used. Weibul's distribution law is one of the least used due to its complexity. The main results of the work are obtained by numerical method. The dependences obtained as a result of the calculations show the existence of the optimal period of preventive maintenance of the object of control, in which the maximum value of its coefficient of technical use is achieved. The result of the work allows to establish the quantitative dependence of the coefficient of technical use on the reliability of control means, scale and form in the form of Weibul's distribution law in a wide range of periodicity of preventive maintenance.
The timing of the evacuation of the wounded is a critical factor that largely determines the fate of the injured soldier. At present, despite considerable efforts to provide the Armed Forces of Ukraine with weapons and military equipment as well as logistical support, including medical equipment and assets, in particular basing as well on international technical aid, the problem of the absence of the required number of specialized medical evacuation means has not been resolved. From this point of view, the question of the correct formation of requirements for rational composition and specially equipped various types of vehicles (including sanitary transporters, ambulances), also general use, casualty evacuation systems, Identifying the possibility of its further improvement through the methodological apparatus is topical. The existing system of military evacuation of the injured and ill people is a four level system where all critically and moderately injured are evacuated. Regarding this, the evacuation system of the injured persons might be considered as queuing network, which has a range of peculiarities. First of all this network of queuing is an open network of queuing service, in other words the flow of applications for the network input is unlimited, homogeneous and is carried out from an external independent source. As a result of the calculations the data were received on the figures of network parameters (average number of requests in queues, average number of requests in the network, average waiting time for requests in service queues, average time of request in the network) and parameters of each queuing system which is operating in the network queuing, – transmission ratio, input flow intensity, downloading ratio, average number of occupied channels, average number of requests in the queuing system, average queue length, average waiting time of the request in the queue for being served, the average time of the request in the queuing system. Analyzing the calculated data from the point of view of creating a rational open queuing network, the system of the injured persons evacuation reaches its maximum efficiency when its productivity on processing the incoming flow of the requests is on its maximum level, and such parameters as the number of service requests in the queue and the number of service channels operating in the network are on its minimum level.
The purpose of the study is to determine the role and place of a separate logistics brigade in the logistics system of the armed forces of the russian federation. The article examines and systematizes data on the composition, structure, tasks and capabilities of a separate logistics brigade, defines its role in the general system of logistics of the armed forces of the russian federation in general and during the full-scale russian invasion of Ukraine in particular; the peculiarities of the use of a separate logistics brigade in the provision of troops (forces) in Ukraine, weak points in the construction of the logistics system of the armed forces of the russian federation and the ways of their violation were determined, a comparative analysis of the forces and means of logistics (rear) support of the armed forces was carried out forces of the russian federation and the United States. This problem is little studied, usually the information on the mentioned issue is limited, not systematized and to a large extent outdated, contains incorrect data, which limits the possibilities of its analysis. At the same time, it is known that only detailed information about all elements of the system allows obtaining correct results during further research. According to the results of the study of the logistical support system, conclusions were drawn regarding the main problems of the logistical support system of the armed forces of the russian federation built during the armed aggression against Ukraine, the main directions of the development of the logistical support system of operational and tactical links of logistical support were determined. Prospects for further research include taking into account the results obtained during the development of appropriate methodological bases for determining the requirements for the structure, composition, construction and capabilities of the forces and means of logistical support of the Armed Forces of Ukraine; improvement of the system of logistical support by its types (in particular, transport support), identification of weak points in the construction of the system of material and technical support of the armed forces of the russian federation and ways of its violation.
The results of the research published in the article will be useful for logistics specialists who are engaged in the organization of the provision of resources (material and technical means) for the processes of operation and renewal of armament and military equipment (AME). The article discusses existing approaches to logistic support of operations (combat actions) and methodological approaches to assess the effectiveness of its operation. The influence of factors and problematic issues on the creation of a modern logistics system of the Armed Forces of Ukraine is analyzed. The scientific substantiation of determination of indicators of efficiency of delivery of resources in the system of logistic support is offered with the purpose of improvement of functioning of the system of delivery of resources for further consideration during planning of activity. According to the results of the analysis, the urgency of making a quick and correct decision in managing the provision of necessary resources was determined. The dependence of resource efficiency on the type of resources, the intensity of applications for their use, and the capabilities of the system to create and replenish resources have been established. The basic concepts and typical structures of the resource delivery system for working out of the research materials are clarified. Based on the analysis, it was found that the evaluation of the efficiency of the system of maintenance of the processes of operation and restoration of AME resources should be carried out by the results of the evaluation of the efficiency of providing the resources of each type individually and further determination of the system performance indicators as a whole, taking into account the corresponding total costs for providing the resources, which allowed to offer methodological an approach to assessing the effectiveness of operating processes and the renewal of AME resources themselves, which allows to take into account the implemented strategy of replenishment of resources and rationality of the selected transport network in the conditions of both peacetime and fighting.On the basis of the proposed methodological approach, the directions of further researches were determined concerning: determination of the list of initial data for determining the characteristics of the routes of resource delivery; determining the number of characteristics that are being optimized; forming a methodological approach for determining a rational transport network in the logistics system.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.