Methodology for Calculating the Required Number of Reserve Elements to Ensure the Required Machinery Fleets’ Serviceability

Abstract

AbstractComprehensive mechanization of activities is accompanied by high costs to ensure the serviceability and operability of machine fleets. There is practically constant need in spare elements (machines, units, parts) in the process of their operation to maintain the required level of machines and equipment use, as well as to perform operations in the planned terms. It is necessary to have an algorithm of actions, which allows finding a rational level of reservation of machines and their parts at different modes of operation and constructive technics perfection. The presented researches have shown that natural and climatic factors, “age” of machines and other conditions have an effect on the failure rate. In this connection, optimization of companies’ repair policy in terms of ensuring serviceability of machinery is a complicated multi-vector problem. The authors’ solution of this problem is given below. The article offers methodology, which enables to determine the required nomenclature and number of spare parts for the known equipment fleet at the given load and under conditions of providing the calculated level of reliability and serviceability of the equipment. Application of the suggested technique optimizes expenses for spare parts at provision of the machines and technological equipment sets’ reliable operation set level. In addition, it becomes possible to obtain rational solutions for the formation of a network of warehouses of different levels to meet the needs of companies with dispersed operation of machines and mechanisms on a large number of objects.KeywordsConstruction machinesEquipment failuresFailure probabilitiesRedundancyReliabilityNomenclatureNumber of replaceable elements