Расчетно-конструкторская модель гиродина

В ходе магистерской диссертации была создана расчетно-конструкторская модель гиродина, включающая в себя расчеты эксплуатационных и прочностных характеристик гиродина, параметрическую 3D модель и систему автоматизированного проектирования для гиродина. Так же был проведен обзор литературу по тематике ориентации и навигации космических аппаратов с помощью исполнительных органов.In the course of the master's thesis, a calculation and design model of gyrodyne was developed, including calculations of the operational and strength characteristics of gyrodyne, the parametric 3D model and the computer-aided design system for gyrodine

ЗАСТОСУВАННЯ SOLIDWORKS ДЛЯ ПІДГОТОВКИ ВИСОКОКВАЛІФІКОВАНИХ ФАХІВЦІВ

Examined the use of SolidWorks computer-aided design system and its application SolidWorks Simulation, designed to solve the problems of mechanics of deformed solids using the finite element method, for the strength calculation of one of the parts of the bearing stripper – the screw (determining the maximum force that can be applied to it).Розглядається застосування системи автоматизованого проектування SolidWorks та її додатку  SolidWorks Simulation, призначеного для розв'язування задач механіки деформованого твердого тіла за допомогою методу скінченних елементів, для міцнісного розрахунку однієї з деталей знімача підшипників – гвинта (визначення максимальної сили, яку можна до нього прикласти)

Computer-aided methods for analysis and synthesis of supersonic cruise aircraft structures

Computer-aided methods are reviewed which are being developed by Langley Research Center in-house work and by related grants and contracts. Synthesis methods to size structural members to meet strength and stiffness (flutter) requirements are emphasized and described. Because of the strong interaction among the aerodynamic loads, structural stiffness, and member sizes of supersonic cruise aircraft structures, these methods are combined into systems of computer programs to perform design studies. The approaches used in organizing these systems to provide efficiency, flexibility of use in an iterative process, and ease of system modification are discussed

Методика интегрированного автоматизированного проектирования элементов конструкции самолета

В статті розглянуто підходи до інтегрованого автоматизованого проектування. Висвітлені проблеми попереднього проектування та запропоновано методико розрахунку типових елементів конструкції літака на прикладі елемента повздовжнього силового набор, як стрингер. Також повністю представлений алгоритм побудов стрингера в системі інтегрованого автоматизованого проектування Siemens NX. Що дозволяє скороти час на проектування та використовувати його як еталон для розрахунку та подальшого змінення просто значень для отримання іншої розмірності стрингерів.Previously applied methods of designing aircraft based on two-dimensional geometric models that made it impossible to take into account all the necessary design and technological features. It was a prerequisite for the development of an integrated methodology that includes design and computer simulation of three-dimensional parametric design of the aircraft as a whole and its individual parts [2-5]. In this paper, the method of computer-aided design stringer at the master model geometry and space allocation wing aircraft. In article approaches to integrated computer-aided design. These types of problems preliminary design and the method of calculation of typical aircraft structural elements for example longitudinal force element sets as stringer. Also, the algorithm constructs a fully stringer system aided design of integrated Siemens NX. What can shorten the design time and use it as a reference for the calculation and further change just values for other dimensions stringers. Methods integrated design ensure the application of standard parametric analytical stringers in the calculation of aerodynamics and strength, life and vitality, weight of the aircraft and its alignment, safety of structures, as well as technological preparation of production and quality control, maintenance and repair. Considered aided design techniques can be extended to other than the stringers typical elements airframe.В статье рассмотрены подходы к интегрированному автоматизированного проектирования. Освещены проблемы предварительного проектирования и предложены методики расчета типовых элементов конструкции самолета на примере элемента продольного силового набор, как стрингер. Также полностью представлен алгоритм построений стрингера в системе интегрированного автоматизированного проектирования Siemens NX. Что позволяет сократить время на проектирование и использовать его в качестве эталона для расчета и последующего изменение просто значений для получения другой размерности стрингеров

Precision Extrusion Deposition of Polycaprolactone/Hydroxyapatite Tissue Scaffolds

Freeform fabrication provides an effective process tool to manufacture advanced tissue scaffolds with specific designed properties. Our research focuses on using a novel Precision Extrusion Deposition (PED) process technique to directly fabricate Polycaprolactone (PCL) and composite PCL/ Hydroxyapatite (HA) tissue scaffolds. The scaffold morphology and the mechanical properties were evaluated using SEM and mechanical testing. In vitro biological studies were conducted to investigate the cellular responses of the composite scaffolds. Results and characterizations demonstrate the viability of the PED process as well as the good mechanical property, structural integrity, controlled pore size, pore interconnectivity, and the biological compatibility of the fabricated scaffolds.Mechanical Engineerin

An integrated methodology for the design of Ro-Ro passenger ships

The present paper provides a brief introduction to the holistic approach to ship design, defines the generic ship design optimization problem and demonstrates its solution by use of advanced optimization techniques

Healthcare technologies and professional vision

This paper presents some details from an observational evaluation of a computer assisted detection tool in mammography. The use of the tool, its strengths and weaknesses, are documented and its impact on reader's 'professional vision' (Goodwin 1994) considered. The paper suggests issues for the design, use and, importantly, evaluation of new technologies in everyday medical work, pointing to general issues concerning trust – users’ perception of the dependability of the evidence generated by such tools and suggesting that evaluations require an emphasis on the complex issue of what technologies afford their users in everyday work

Influence of the Tunnel Shape on Shotcrete Lining Stresses

Tunnel excavation is frequently carried out in rock masses by the drill and blast method and the final shape of the tunnel boundary can be irregular due to overbreaks. In order to investigate the effects of overbreaks a study of the effect of tunnel boundary irregularity has been carried out. This is done developing a computational tool able to take into account fuzzy variables (i.e., thickness of the beams of the bedded spring approach used for the model). The obtained results show that irregularity effects should be considered when a shotcrete lining is used as the final tunnel lining (for the case where the tunneling procedure does not permit a smooth surface to be obtained). This is crucial to obtain a durable linin

Part Repair using a Hybrid Manufacturing System

Nowadays, part repair technology is gaining more interest from military and industries due to the benefit of cost reducing as well as time and energy saving. Traditionally, part repair is done in the repair department using welding process. The limitations of the traditional welding process are becoming more and more noticeable when the accuracy and reliability are required. Part repair process has been developed utilizing a hybrid manufacturing system, in which the laser aided deposition and CNC cutting processes are integrated. Part repair software is developed in order to facilitate the users. The system and the software elevate the repair process to the next level, in which the accuracy, reliability, and efficiency can be achieved. The concept of repair process is presented in this paper. Verification and experimental results are also discussed.Mechanical Engineerin