Інженерна механіка та транспорт (EMT-2013). – 2013 р.
Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/26746
Матеріали IІІ Міжнародної конференції молодих вчених EМТ-2013
У збірнику опубліковано матеріали конференції, присвяченої проблемам у галузі інженерної механіки, транспортних технологій, машинобудування, автоматизації виробництва. Видання призначено для науковців, аспірантів, студентів.
Інженерна механіка та транспорт : матеріали IІІ Міжнародної конференції молодих вчених EМТ-2013, 21–23 листопада 2013 року, Україна, Львів / Міністерство освіти і науки, молоді та спорту України, Національний університет "Львівська політехніка". – Львів : Видавництво Львівської політехніки, 2013. – 112 с. : іл. – (4-й Міжнародний молодіжний фестиваль науки "Litteris et Artibus"). – Паралельний титульний аркуш англійською.
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Item Моделювання роботи важільних механізмів на базі центрального прямолінійно напрямного кривошипно-повзунного механізму у SolidWorks(Видавництво Львівської політехніки, 2013) Міняйло, ПетроThe simulation of straight-line mechanisms and dwell mechanisms on the basis of slider-crank mechanism in SolidWorks is viewed. Straight-line mechanisms, which is widely used in modern engineering, describe the rod curve that in a particular area is close to a straight line, which provides a dwell of the final link of mechanism. Graphs for the kinematic parameters of dwell mechanisms are shown. The main aim of the research – to simulation the mechanisms and test their kinematic parameters. As seen from the results, the use of modern CAD systems such as SolidWorks, allows you to check all the necessary parameters based on computer models of mechanisms and significantly simplify experimental study of physical models of mechanisms and machines.Item Удосконалення взаємодії станцій примикання і під’їзних колій морських портів(Видавництво Львівської політехніки, 2013) Чеклов, Володимир; Шеховцов, Олексій; Матвієнко, СергійSea ports are an important element of the economy. Port's efficiency affects on the transport links with foreign countries. Most of the cargos is delivered to the ports and transported from them by railway transport. Therefore, improvement of technology of interaction of railways and ports is very important. Measures to improve the interaction technology of stations and ports have been proposed. The interval between the innings of cars has been reduced. The number of cars in the supply was increased. Improvements are proposed based on local conditions and traffic safety. This will allow to use the engineering tools more effectively.Item Визначення напружено-деформованого стану пористої гумової плити в умовах нелінійного деформування(Видавництво Львівської політехніки, 2013) Гребенюк, Сергій; Юрєчко, ВасильThere was created an approach for the numerical analysis of stress-strain state of the porous plate in non-linear strained conditions. Porous body stress tensor is based on the general Hooke’s law and includes the dependence from the porous material elasticity, metric tensor components, approximation of the first, second and the third strain tensor invariants. For viscoelastic deformation modeling there’re used integral relations based on Boltzmann-Volterra genetic theory. There was made a calculation of porous plate allowing the relaxation only of the porous rubber shift module in terms of viscoelastic deformation using the relaxation core. As a result, there were received the components of deformation stress state i.e. time distribution of normal stresses and motion dependence on both time and stress.Item Визначення напружено-деформованого стану гумового буфера на основі уточненої моментної схеми скінченного елемента(Видавництво Львівської політехніки, 2013) Гребенюк, Сергій; Бова, ГаннаThis work is devoted to elaboration and numerical realization of method of research of the stressstrain state of the rubber buffer taking into account weak compressibility on the basis of the precise finite element moment scheme. To determine the stress-strain state of the rubber buffer in conditions of linear deformation the threedimensional finite element method has been used. For increasing the accuracy of numerical results the precise finite element moment scheme has been applied. This scheme is a modification of moment scheme and envisages the receipt of expressions for deformations on the base of supplement of approximating initial polynomials of finite elements to a complete. The undertaken research shows that calculation of rubber constructions taking into account weakly compressibility of materials allows getting the adequate results using the cubic approximation of displacements.Item Критерій порівняльної оцінки схем організації дорожнього руху за витратами палива(Видавництво Львівської політехніки, 2013) Гецович, Євген; Казакова, МаринаThe paper deals with the influence of traffic on the change in fuel consumption of the vehicle when driving in certain modes of motion. The purpose of the article is to describe the technique of determining the criterion of comparative assessment of traffic options on fuel consumption. The obtained criterion is based on resulting of the coefficient of relative change in fuel consumption of traffic depending on the driving modes , namely the free driving mode with stops, free-driving mode with excessive speed , freedriving mode with ermitted speed , "start-stop" mode and constrained mode movement. The proposed method of determining the comparative evaluation of fuel consumption, depending on the mode of traffic flow , will allow for a comparative assessment of measures directed to traffic manasement and provide recommendations for the introduction of specific measures.Item Optimal synthesis of the impulsive resonant two-mass vibro-impact systems(Видавництво Львівської політехніки, 2013) Gursky, Volodymyr; Murashev, Sergiy; Gogol, RostyslavThe article solves the applied problem of the technological efficiency increase of resonant two-mass vibrating machines with an impulsive electromagnetic drive based on optimization synthesis and frequency analysis of asymmetric piece-linear elastic description. The value of speed of working mass is accepted for an objective function. Synthesis is based by frequency coefficient and relation of eigenfrequencies. The rational resilient parameters of asymmetric piece-linear elastic description settle accounts after the optimum values of the proper coefficients. The availability of the poly-frequency spectrum in the resonant mode of machine, operated by impulsive electromagnetic perturbation, is confirmed by the dynamic analysis and numerical system modeling.Item Покажчик авторів(Видавництво Львівської політехніки, 2013)Item До проблеми попередження транспортних заторів(Видавництво Львівської політехніки, 2013) Ширін, ВалерійThe paper deals with the issues concerning traffic flow management on congested sections of the road network of cities by changing the speed limit when approaching them. The purpose of the given article is to describe a methodology for determining the speed of vehicles, which can be implemented with the help of technical means of traffic management to reduce traffic delays when driving through intersections and increase the capacity of streets and roads in general. The proposed method is based on the use of controlled traffic signs that are part of automated traffic management systems. The speed rate, the length of the slowdown road section and position parameters of regulated road signs refers to the speed limit parameters change. The listed controlled parameters are determined on the basis of the vehicle speed depending on the traffic flow at road junctions before crossing the traffic light control loop parameters.Item Дослідження демпфера нормально закритого чи відкритого з керуванням по тиску стиснутого повітря пневматичного привода(Видавництво Львівської політехніки, 2013) Ковриженко, Д. В.A mathematical model of the pneumatic actuator with the damping rod at the end of stroke was made. Transient movement of the actuator piston is considered as adiabatic and in pseudo steady-statement. It is assumed that the compressed air is an ideal gas. Not any air leak in the drive is out. Designs of regulators normally open and closed adaptive to the level of pressure in the chambers of the drive was create. The design of the damper to the universal changeover from normally open to normally closed and vice versa. A mathematical model of adaptive dampers for the influence of design parameters on the process of damping was written. The greatest impact parameters are: the diameter of the piston, the spring constant, the zero offset spring, and the angle forming the rod to its axis. The optimal design of the drive, which provides a smooth stop for a range of pressure as the nominal flow rate, mass, and the constant force load, was found. In work showed the efficiency of a damper on the parameters established speed braking and a swing speed.Item Аналіз використання міжнародних транспортних коридорів в Україні(Видавництво Львівської політехніки, 2013) Чеклова, Валентина; Панченко, Юрій; Костиря, ІринаThe article analyzes the international transport corridors concerning Ukraine. We consider separately each of the corridors, their length along grated Ukraine as rail and road journey. The features of the data corridors, their disadvantages. Create ITC and entering them into the international transport system is recognized nationwide priority direction of development of the transport system of Ukraine. Since 1998, implemented a number of important tasks "Program establishment and operation of a national network of international transport corridors Ukraine". On the infrastructure ITC, new technologies, the development of information systems, conducting research. The fact that the state has a very high coefficient of transitivity (Transport attractive) and therefore recovery, development and expansion of transport corridors is important for Ukraine.