Impact of climatic conditions on the parameters of failure flow of military vehicles

Abstract

Relevance of the article is based on participation of armed forces in various operations and exercises, where reliability of machinery is one of the most important factors. Transportation of soldiers as well as completion of variety of tasks is ensured by properly functioning technical equipment. Reliability of military vehicles – armoured SISU E13TP Finnish built and HMMWV M1025 USA built were selected as the object of the article. Impact of climatic conditions on reliability of the vehicles exploited in southwestern part of the Atlantic continental forest area is researched by a case study of the vehicles exploitation under conditions of the climate of Lithuania. Reliability of military vehicles depends on a number of factors such as properties of the vehicles and external conditions of their operation. Their systems and mechanisms are influenced by a number of factors that cause different failures. Climatic conditions represent one of the factors of operating load which is directly dependent on the climate zone. Therefore, assessment of the reliability is started with the analysis of climatic factors affecting operating conditions of the vehicles. Relationship between the impact of climatic factors and failure flow of the vehicles is presented and discussed.

Semi-Markov approach for reliability modelling of light utility vehicles

“…The probability of reaching a subset of states A up to time t corresponds to the value of the unreliability function Fi(t). 𝐹 𝑖 (𝑡) = 𝛷 𝑖𝐴 (𝑡) = 𝑃(𝛩 𝐴 ≤ 𝑡|𝑋(𝑡 = 0) = 𝑖), (10) where ΘA is a random variable that determines the time when the object reaches a subset of states A.…”

“…Technical availability and reliability of vehicles are two of the main determinants of operational effectiveness in modern and advanced transport systems. The appearance of a means of transport failure in the course of the implementation of transport processes generates functional interference with respect to the entire system [10,23]. For this reason, the operational strategy of many objects and systems assumes periodic preventive maintenance, whose interval and scope depend on both technical and economic factors [18].…”

Reliability Analysis of Military Vehicles Based on Censored Failures Data

“…The Kaplan-Meier estimator was used to estimate the values of the unreliability and reliability functions. The study was based on the data in Table 2 and the relations (7) and (8). The results are presented in Table 3.…”

“…In order to meet the challenges posed to the armed forces and the requirements for the efficient implementation of transport processes, appropriate maintenance, diagnostic and repair systems must be organised. Reliability models are useful tools for forecasting and evaluating the maintenance and repair needs of military vehicles [6][7][8]. Therefore, the development of accurate reliability models is critical to maintaining the assumed readiness and effectiveness of military transport systems.…”