Моделювання механічної та електричної взаємодії контактної підвіски
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Дата
2018
DOI
10.20998/2413-4295.2018.09.07
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
Національний технічний університет "Харківський політехнічний інститут"
Анотація
У роботі для визначення статичних та динамічних параметрів, а також критеріїв стану елементів контактної підвіски пропонується застосувати кінцево-елементні моделі, які найбільш адекватно описують фізичні процеси і використовуються зараз в світі. Запропоновано розвиток таких моделей на базі кінцевих елементів та структурування механічних та електричних графів пролетів анкерних ділянок. Розроблені однотипні механічні та електричні мультиграф проліта анкерної ділянки, що дозволяє визначити стан параметрів контактних підвісок з урахуванням теплового зносу.
In work using the methods of multi-graphs and finite elements, the simulation of the interaction of current collectors and contact pendant is considered. The interaction of the contact pendant with current collectors is a complex oscillatory process, which consists of dynamic systems of different types. So the railroad and contact pendant belong to the class of systems with distributed parameters, and components of rolling stock such as the crew and current collectors can be attributed to a class of systems with lumped parameters. The contact point of the coils of the current collectors with the contact wire is in the mechanical dynamic periodic oscillation process. Mechanical excitations are caused by fluctuations, both from the side of the contact pendant, and the crew part of the rolling stock. In addition, along the contact pendant on both sides of the point of applying the pressure of each of the current collectors, the waves of oscillations affect the interaction of the contact pendant with other current receivers. On the general system of interaction of the contact pendant, the current receiver is also affected by random factors: wind loads, imbalance (dislocation) of the contact pendant, etc. To determine the static and dynamic parameters, as well as the criteria for the status of contact suspension elements, it is expedient to use finite element models that most adequately describe the physical processes and are currently used in the world. The work proposes the development of such models on the basis of finite elements and the structuring of mechanical and electrical graphs of spans of anchor sections. The mechanical and electric multigraphs of an anchor section have been developed, which allows to determine the state of parameters of contact suspensions taking into account the thermal wear. Increasing the tension of wires and cables not only improves the quality of the snap, but also makes it possible to improve the design of the contact network as a whole: the construction height of the suspension can be reduced to 1.4 m with a span length of 70 m.
In work using the methods of multi-graphs and finite elements, the simulation of the interaction of current collectors and contact pendant is considered. The interaction of the contact pendant with current collectors is a complex oscillatory process, which consists of dynamic systems of different types. So the railroad and contact pendant belong to the class of systems with distributed parameters, and components of rolling stock such as the crew and current collectors can be attributed to a class of systems with lumped parameters. The contact point of the coils of the current collectors with the contact wire is in the mechanical dynamic periodic oscillation process. Mechanical excitations are caused by fluctuations, both from the side of the contact pendant, and the crew part of the rolling stock. In addition, along the contact pendant on both sides of the point of applying the pressure of each of the current collectors, the waves of oscillations affect the interaction of the contact pendant with other current receivers. On the general system of interaction of the contact pendant, the current receiver is also affected by random factors: wind loads, imbalance (dislocation) of the contact pendant, etc. To determine the static and dynamic parameters, as well as the criteria for the status of contact suspension elements, it is expedient to use finite element models that most adequately describe the physical processes and are currently used in the world. The work proposes the development of such models on the basis of finite elements and the structuring of mechanical and electrical graphs of spans of anchor sections. The mechanical and electric multigraphs of an anchor section have been developed, which allows to determine the state of parameters of contact suspensions taking into account the thermal wear. Increasing the tension of wires and cables not only improves the quality of the snap, but also makes it possible to improve the design of the contact network as a whole: the construction height of the suspension can be reduced to 1.4 m with a span length of 70 m.
Опис
Ключові слова
струмоприймач, контактний провід, знос контактного проводу, мультиграф, contact pendant, current receiver, contact wire
Бібліографічний опис
Любарський Б. Г. Моделювання механічної та електричної взаємодії контактної підвіски / Б. Г. Любарський, І. В. Доманський, М. І. Гасанов // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Нові рішення в сучасних технологіях = Bulletin of the National Technical University "KhPI" : coll. works. Ser. : New solutions in modern technologies. – Харків : НТУ "ХПІ", 2018. – № 9 (1285). – С. 51-56.