Кваліфікаційні роботи здобувачів вищої освіти кафедри підтримання льотної придатності повітряних суден
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Browsing Кваліфікаційні роботи здобувачів вищої освіти кафедри підтримання льотної придатності повітряних суден by Subject "aircraft"
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- ItemImprovement of the Boeing 737 airworthiness system based on the implementation of European aviation regulations(National Aviation University, 2020-12) Kolpakov, OleksandrOne of the fundamental things in the aviation industry is airworthiness. Airworthiness is a characteristic of an aircraft, which is ensured by the principles envisaged and implemented in its design and performance parameters and allows a safe flight to be carried out under the expected conditions and with established operating methods. The expected operating conditions include the range of design conditions defined by the airworthiness standards, as well as the operating limits and recommended flight conditions established for a given aircraft type at the time of certification. Continuing airworthiness of aircraft - one of the most important factors of safety in civil aviation and the efficiency of the air transport industry today. This paper will analyze the use of the airline's Boeing 737 fleet, analyze the reliability system and the maintenance program. Also, the work will pay attention to the analysis of regulatory documents that regulate the activities of organizations for maintenance and Continuing airworthiness. Innovative paperless manufacturing methods are proposed as suggestions for improving the airworthiness system. The issue of improving the system of training professional personnel in this area is also raised, based on the introduction of European aviation regulations.
- ItemImproving of wear resistance of aeronautical equipment parts by gas-thermal coatings(National Aviation University, 2022-11) Zadniprianyi, Artem; Задніпряний, АртемToday almost all fields of engineering, manufacturing building constructions, energy, engine, aerospace, as well as in other areas of new technology widely use thermal coatings. With coatings we can solve many problems, increase of weather resistance, operational stability, adhesion, thermal stability, erosion resistance, protective properties and chemical resistance for calendar resource. But the most important problem is to increase the wear resistance of parts, assemblies of machines. Application of protective wear-resistant coatings - is one of the most effective means of struggling with fretting wear. Currently, developed and used number of technological methods and a large range of materials that allow to obtain coatings with high wear resistance. In the production and repair of aviation equipment parts as wear-resistant coatings, the most widely used coating derived by gas-thermal spraying methods. One of the areas in the protective coating is by plasma spraying. With high performance spraying, this technological method allows to deposit coatings with a wide range of characteristics, and apply them to restore dimensions of worn parts. Implementation of the hot-gas methods of applying protective coatings only effective when properly choosing the material and its properties matching technological capabilities specific spraying techniques. However, information about the properties of powders produced, for lack of wear-resistant coatings and existing construction incomplete and contradictory.
- ItemIncrease resource of wing high lift devices of aircrafts of high-strength steels(National Aviation University, 2022-11) Kostianets, illia; Костянець, ІлляEnsuring of the high figures of wearability and durability of friction details is one of the major factors of reliability increasing and increasing of modern machines life cycle. Statistics shows that about 80 % of failures in the machines work occur as the result of wear and destruction of friction surfaces of machines details. Wear leads to the decreasing of the products functional qualities and to the loss of their consumer value. Increasing of products wearability contribute both and applying of materials with the high wear resistance, and design decisions, ensuring the compensation of wear, redundancy of wearability, common improving of friction conditions (using of high quality lubricants, protection from the abrasive influence, for example: welding deposition, thermal spraying, metallization and others). Wear can be considered as the mechanical process, complicated by the actions of physical and chemical factors, which cause the durability decreasing of surface layer microvolumes. Due to the wear the shaped and sizes of the details are changed, it results in the increasing of gaps in the movable connections, disruption of fit density of immovable connections. At the detail wear limit occurrence, its further using is impossible, because of disruption of node or mechanism normal work that can result in accident.
- ItemIncreasing the service life of aircraft parts with vacuum arc coatings(National Aviation University, 2021-12) Lukianenko, Yevhenii Viktorovich; Лук'яненко, Євгеній ВкторовичEnsuring high levels of durability and wear resistance of friction parts is a decisive factor in improving reliability and service life of modern machines. Statistics shows that about 80% of faults in the machines are caused by wear and fracture of friction surfaces of machine parts. For aircraft the loss of details performance in the friction nodes is most often associated with the development of fretting. The landing gear details are one the most critical details of modern passenger and cargo aircrafts. The analysis of landing gear materials revealed that such world famous companies as Boeing, Airbus, Antonov more often use titanium alloys for landing gear details production. These alloys meet the working conditions of the landing gear in terms of endurance, but they have low wear resistance. With the help of coatings application many problems can be solved. Such as improving weather resistance and operational stability, grip strength, heat resistance, erosion resistance, protective properties and chemical resistance for a calendar resource. Therefore it is necessary to choose the coating to apply it on the details friction surfaces which can not only increase the wear resistance of new components, but can be used during the restoration processes.
- ItemIncreasing the wear-resistance of aircraft Boeing 737 landing gear parts(National Aviation University, 2022-11) Astakhov, Yehor; Астахов, ЄгорOne of the most important conditions for ensuring a given level of flight safety and increasing the efficiency of using aircraft is the development and implementation into practice of effective lubricating materials and equipment for assessing their technical condition. The development of such lubricating materials is of particular relevance for such a complex dynamic object as a main landing gear during its operation according to its technical condition. Relevance of the topic One of the most difficult tasks in the technical operation of aviation equipment is the diagnosis of the highly loaded structure elements and assemblys. According to ICAO, the occurrence of about 28-32% of incidents on the aircraft occurs precisely on landing gear. The functioning of the landing gear is based on complex physicochemical processes that take place in the trunnion pin assembly of the main landing gear and can cause the appearance of damaged structural units, and therefore, the diagnostics of the structural elements of the landing gear of a modern turbojet aircraft is carried out on the basis of the methods of parametric identification of the trouble shoot of the landing gear system. The main purpose of diagnostics is to make a decision about the lubricating materials of the controlled object, i.e. recognition of the state (classification) of an object according to the diagnostic signs determined during the monitoring process is the final result of the diagnostic process. The reliability of the diagnosis as a whole largely depends on the quality and efficiency of the recognition. Therefore, the development of a state classifier is an important and urgent task in solving the general problem of monitoring and timely detection of damage to complex dynamic objects in the process of their functioning.
- ItemMethodical bases for maintaining the operational reliability of caisson tanks of a four-engine turboprop cargo plane(National Aviation University, 2022-11) Kozolii, Viacheslav; Козолій, Вячеслав ОлександровичThe development of civil aviation in the world makes it possible to meet the needs of the civilian population in comfortable conditions of movement over long distances with minimal time spent in comparison with other types of transport. But it is worth realizing that in the pursuit of a low cost, which would allow attracting a large number of both new and regular customers, and a low cost of organizing such transportation, which is of interest above all to companies seeking to develop in the aviation sector, the safety and comfort of customers should not be neglected . After all, the blind pursuit of the opportunity to increase one's fortunes eventually leads to terrible disasters with a large number of human victims. At the same time, companies bear correspondingly terrible losses. In order to increase the level of flight safety, international organizations have been created that have undertaken the implementation of the issue of regulation, standardization of the conditions for servicing the fleet of aircraft, rules for flight operations, requirements for the safety and reliability of both new and already manufactured aircraft, as well as supervision of compliance with these rules by all companies engaged in commerce in the field of aviation and the manufacture of aviation equipment. In turn, the companies undertake to provide complete information, which is necessary to increase the safety of flights and the reliability of aviation equipment. But one way or another, various factors lead to the occurrence of various incidents and disasters. That is why aviation designers, when developing new types of aviation equipment, lay down new engineering solutions, solve a number of certain problems, which in turn will increase the reliability and safety of the operation of the aviation fleet of equipment. In addition, designers and engineers are engaged in the modernization of elements and systems of already existing aircraft. 15 The purpose of this diploma project is to analyze the design of the fuel system of the An-70 aircraft in order to identify factors that affect the probability of a fire occurring in the fuel tanks-caissons of four-engine turboprop cargo aircraft and to carry out the necessary modernization of the identified weak points of the fuel system in order to increase the operational reliability of the system, and flight safety in general.
- ItemMethods of testing on wear at high contact pressure(National Aviation University, 2022-11) Kyryk, Liliia; Кирик, ЛіліяAs our technological civilization expands, material and energy conservation is becoming increasingly important. Wear is a major cause of material wastage, so any reduction of wear can result considerable savings. Friction is a principal cause of energy dissipation and considerable savings are possible by improved friction control. It is universally recognized that friction and wear are common phenomena, which occur at machinery components which run together. At present, research in the field of tribology and mechanics of contact fracture of elements and units at variable load modes represents current direction. It causes significant amount of operational failures of technical objects of various purposes. The researchers investigate friction and wear behavior of materials because of adverse effect observed in the performance and life of machinery components. Fretting, being a special kind of material wear, considered in this degree work, takes up to 50% of wear of aircraft parts. All materials in almost all kinds of environment and conditions are subjected to the influence of fretting. For example, according to [2], among the main operational defects in domestic and foreign aircraft gas turbine engines, fretting type of wear constitutes 60% of all types of wear. Flexible couplings and splines, particularly where they form a connection between two shafts and are designed to accommodate some slight misalignment, can suffer severe fretting wear. Jointed structures are another source of fretting problems. Eventually, there is no such thing as a static joint on an aircraft. In turbines, where the turbine disk is either shrink-fitted onto the driving shaft or attached to the shaft by means of a bolted flange and where the blades are fixed into the disk by either a dovetail or fir-tree type fixture – here and not only fretting can take place.
- ItemModification of the design of the transport category aircraft during the overhaul(National Aviation University, 2020-12) Podreza, MykhailoTaking into account the technical equipment of the enterprise, the qualifications of the personnel, sufficient experience in the overhaul and modernization of aircraft of the "An" type at the enterprise, it should be noted that, since 1992: - a full cycle of overhaul of An-32 aircraft has been worked out and mastered; - worked out and mastered the complex of works on modernization of An-32 aircraft in accordance with the documentation of the Developer; - the execution of resource bulletins No. 515-BE-B, No. 515/1-BE-B, as well as repair bulletins on An-32 airplanes was worked out and mastered; - fully certified technological processes, personnel, production and quality management system, which is confirmed by the Certificate of the Ministry of Defense of Ukraine No. UAR - MAA- 145.0112, License of the Ministry of Economic Development and Trade, series AB No. 597938 for the right to repair and modernize military aviation equipment, Certificate of Approval organizations for TO No. UA .145.0023 for compliance with the Rules PART- 145 of the State Aviation Service of Ukraine, Certificate No. HTI / 130-55 / 2011 for compliance with NATO Standard AQAP -2120 on the quality system for repairing military aircraft, issued by the Hungarian Ministry of Defense. Analyzing the state of the An-32 aircraft of the Indian Air Force, there is full reason to assume that in order to ensure operational reliability and flight safety, the Customer deliberately provided to the enterprise for repair aircraft that had previously been repaired at the Customer's base. Taking into account the actual technical condition of these aircraft, which have been in operation since 1984, as well as the technical capabilities to ensure the quality of repair and modernization of the enterprise and the base of the Customer, it should be noted a positive trend of sending the An-32 aircraft for repair to the enterprise after the previous repair at the Customer's base. ...
- ItemResearch of wear resistance of high-temperature coverings at fretting corrosion(National Aviation University, 2022-11) Semeniuk, Orest; Семенюк, ОрестWorking conditions of turbine blades modern aviation gas turbine engines (GTE) characterized by high levels of current static loads, wide range of operating temperatures, high speed of rotation, and as a result – high vibroloading. Given the general trend towards the growth of inter-repair and general technical resources are increasing the increase of traction characteristics becomes more significant GTE, which causes an increase in the limits of permissible loads and operating temperatures of blades. To reduce the vibroload, the blades are tightened in the upper part on the zigzag surfaces. As a result of vibro displacement is intense wear contact the surfaces of the shelves as a result of the development of fretting-corrosion that leads to increased wear and premature release parts of the system. In addition, the destruction due to the occurrence cyclic displacements in a nominally fixed connection. The shanks of the blades are also subjected. The purpose of the study was to find such a material, which at higher operating temperatures should have higher values wear resistance.
- ItemThe study of the technological process of the repair of the high-rise system(National Aviation University, 2022-11) Heichenko, Dmytro; Гейченко, ДмитроEquipping civil aviation with new equipment sets the repair company the task of carrying out timely and high-quality repairs to the aircraft and engine park. In this diploma project, the main technical and economic indicators are calculated, the issues of economic calculation and improvement of a typical technological process are presented. The major part of the diploma project is devoted to the equipment used in the typical technological process of repairing the equipment of the high-altitude system of the An-type aircraft (on the example of the An-32). The improved technological process of repair, thanks to the use of automation and mechanization means, allows to significantly increase labor productivity, reduce the cost price, and improve the organization and culture of production. Solving the tasks of the planned organization of the production process, modern repair enterprises are working towards further improvement of the current-bench method of repair. The continuous growth of production, the constant improvement of repair equipment and technologies, the introduction of the latest scientific achievements in the field of production processes dictates the need to use the most advanced repair methods in the technological process.