نشریه پژوهش در مهندسی نگهداشت دفاعی
سال سوم شماره 2 (پیاپی 6، پاییز و زمستان 1400)

The increasing development of electrical systems and equipment, as well as the dependence of many services and communications in the world today on these components, has increased the sensitivity to maintain the safety and stability of such equipment. It is also very important due to the sensitivity of the equipment and exposure to threats, and taking measures to prevent injury or reduce damage. For this purpose, the implementation of a defense system in this equipment is of great importance. This study describes the role of passive defense in electrical systems. In this regard, passive defense (including 9 factors, camouflage, concealment, deception, cover, division and dispersion, announcement, quantitative and qualitative development, safety) is considered as an independent variable and electrical systems as a dependent variable. This research is a descriptive-survey research from the point of view of applied purpose, from the point of view of how to collect data, and from the type of correlation, from the point of view of quantitative data type and from the point of view of time, it is a cross-sectional research. Its statistical population also includes 50 people of all refinery experts who have been selected as a sample due to the limited size of the statistical population. The results indicate that the use of appropriate methods for passive defense is effective in protecting refineries. It is also possible to implement physical protection measures as an inevitable thing in passive defense in such equipment. So that one of the low-cost measures against natural and unnatural threats is physical protection measures in passive defense.

The existence of a warehouse with a coded and regular storage system with the aim of providing parts to support production operations is inevitable. In this article, our goal is to identify and rank the factors affecting the creation of stagnant items in storage and ways to reduce it in Parsian Gas Refinery. Therefore, in order to design the framework and extract the research questions, after studying the warehousing literature, interviews have been conducted with the company's experts and using the opinions of experts, the possible causes and factors that are considered as influential factors in creating stagnant items in the warehouse are identified and Will be examined. Then, using the Delphi method questionnaire, the opinions of experts and experienced experts, the factors affecting the creation of stagnant items in the warehouse and solutions to reduce it in Parsian Gas Refinery are identified and using the AHP method, the proposed solutions are prioritized. Finally, based on the results of the research, some suggestions are presented in order to effectively deal with the identified factors.

Physical asset management is"the optimal management of the equipment life cycle to achieve sustainable business goals."Development of asset management programs at all stages of the equipment life cycle from the definition of requirements to the design،then operation maintenance،finally scrapping is the main priority of the asset management system.In the meantime, buildings and facilities are of special importance and due to the dynamic nature of their use, maintenance and repair of buildings and facilities requires its own requirements and should be planned and implemented in accordance with the long-term and strategic goals of the organization.This paper presents the framework for developing a strategic document.In order to formulate this framework, by reviewing the documents of various organizations in maintenance and repair of buildings and facilities, the requirements of a framework and strategic model of management of maintenance and repair of buildings and facilities are extracted and then the importance of each needs from the point of view of experts in this field.Been investigated.A comparative study shows that the main requirements of a strategic document include determining the standard of building conditions, how to evaluate, determining the schedule of maintenance activities in accordance with the assessments, determining the level of service expected from assets, developing a plan for maintenance activities and how to allocate and finance To implement them.The results of the analysis of the collected data show that the requirements identified in the country's organizations are also important and should be addressed in process of developing a strategic document for maintenance management.

Identifying operational maintenance damages in the field of materials, parts, fluids and how to store them can be effective in the correct implementation of operational maintenance. Considering that the organization's armor conservation systems are facing damages and problems and have reduced the effectiveness and efficiency of the current system, this research can provide suitable solutions to solve the problems of the operational maintenance methods. present these problems. This research is practical and in it, the collected experiences of commanders, experts and officials of the organization have been exploited. Also, the research method is descriptive-analytical, which the researchers tested by using a questionnaire among 47 net experts, regarding the identification of the damages of the operational maintenance method of the armored devices of the combat units that could be relevant. The validity of the questionnaire was confirmed by using the Lauche coefficient, and the reliability of the questionnaire was confirmed by using Cronbach's alpha of 0.89. The results of the research show that the most major damages and problems in the implementation of the operational maintenance method of the armored devices of the organization's units in this area are: fluid damage, damage to space and storage space, damage to parts and equipment. And the main damages in these components are, respectively: the use of improper, non-standard and low-quality engine oil, grease and fuel, and improper storage in the warehouse in terms of moisture and dust.