Простийпошук |
Розширенийпошук |
Покажчики
|
Професійний пошук |
Рубрикатор НБУВ |
Розподілений пошук |
Бази даних
Наукова періодика України - результати пошуку
Книжкові видання та компакт-дискиЖурнали та продовжувані виданняАвтореферати дисертаційРеферативна база данихНаукова періодика УкраїниТематичний навігаторАвторитетний файл імен осіб
 |
Для швидкої роботи та реалізації всіх функціональних можливостей пошукової системи використовуйте браузер "Mozilla Firefox" |
|
|
Повнотекстовий пошук
Список видань за алфавітом назв: Авторський покажчик Покажчик назв публікацій  |
Пошуковий запит: (<.>K=Y25<.>) | |||
|
Загальна кількість знайдених документів : 3 Представлено документи з 1 до 3 |
|||
| 1. | 
Стецко А. А. Определение критической скорости грузового вагона на тележках типа Y25 путем компьютерного моделирования [Електронний ресурс] / А. А. Стецко // Збірник наукових праць Української державної академії залізничного транспорту. - 2013. - Вип. 139. - С. 192-196. - Режим доступу: http://nbuv.gov.ua/UJRN/Znpudazt_2013_139_34 | ||
| 2. | 
Fomin O. Justifying the prolongation of the service life of the bearing structure of a tank car when using Y25 bogies [Електронний ресурс] / O. Fomin, A. Lovska, K. Ivanchenko, I. Medvediev // Восточно-Европейский журнал передовых технологий. - 2021. - № 3(7). - С. 6-14. - Режим доступу: http://nbuv.gov.ua/UJRN/Vejpte_2021_3(7)__3 This paper substantiates the use of Y25 bogies under tank cars in order to prolong their service life. The reported study has been carried out for a tank car with rated parameters, as well as the actual ones, registered during full-scale research. Mathematical modeling was performed to determine the basic indicators of the tank car dynamics. The differential equations of motion were solved by a Runge - Kutta method using the Mathcad software package (USA). It was established that the use of Y25 bogies under a tank car with rated parameters could reduce the acceleration of its bearing structure by almost 39 % compared to the use of standard 18 - 100 bogies. Applying the Y25 bogies under a tank car with the actual parameters reduces the acceleration of its load-bearing structure by almost 50 % compared to the use of standard 18 - 100 bogies. The derived acceleration values were taken into consideration when calculating the bearing structure of a tank car for strength. The calculation was performed using the SolidWorks Simulation software package (France). The resulting stress values are 18 % lower than the stresses acting on the load-bearing structure of a tank car equipped with 18 - 100 bogies. For the load-bearing structure of a tank car with the actual parameters, the maximum equivalent stresses are 16 % lower than the stresses when the 18 - 100 bogies are used. The design service life of the load-bearing structure of a tank car was estimated taking into consideration the use of Y25 bogies. The calculations showed that the design service life of the bearing structure of a tank car equipped with Y25 bogies is more than twice as high as that obtained for 18 - 100 bogies. The study reported here would contribute to compiling recommendations for prolonging the service life of the load-bearing structures of tank cars. | ||
| 3. | 
Fomin O. V. Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies [Електронний ресурс] / O. V. Fomin, A. O. Lovska // Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu. - 2021. - № 5. - С. 67-72. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2021_5_13 Purpose. To determine the basic dynamic characteristics of a standard Ukrainian boxcar with the Y25 bogie by means of the mathematic modelling of dynamic loads in the vertical plane and to compare them with the dynamic characteristics obtained for a boxcar with the 18 - 100 bogie. It can be used for substantiation of application of the Y25 bogie as more promising, which can improve the operational efficiency of rail transportation and foster integration of the Ukrainian transport system into the European transportation complex. Methodology. The authors used the mathematical modelling of a boxcar with the Y25 bogie. The research was made in the vertical plane. It was taken into account that an empty car passed over a joint irregularity. The research was made for an 11 - 217 boxcar as a predominant type to be used. The authors studied the motion of a car on the 18 - 100 and Y25 bogies. The basic dynamic characteristics were determined for a boxcar with the nominal (design) dimensions of the carrying elements and a boxcar with the actual dimensions (after a long service life) on the basis of the field tests. The differential equations were solved by the Runge - Kutta method in MathCad software suite. The initial displacements and the speeds were taken equal to zero. The following dynamic characteristics of a boxcar were obtained: acceleration of the body in the center of mass, acceleration of the body in the areas of support on the bogies, forces in the spring suspension of the bogie, and dynamic coefficients of the bogies. Findings. The theoretical research showed that the basic dynamic characteristics of a boxcar with the nominal dimensions were improved by 38 - 51 % in comparison to a similar one with the 18 - 100 bogie, and for a boxcar with the actual dimensions the dynamic characteristics were improved by 43 - 50 %. Originality. The authors substantiated the application of the Y25 bogie for a standard Ukrainian boxcar with the nominal and actual dimensions of the carrying elements by means of the mathematical modelling of the dynamic loads in the vertical plane. Practical value. Due to lower dynamic loads on the carrying structures of freight cars with the Y25 bogie, it is possible to improve the dynamic characteristics of the structures under the operational modes, to increase the fatigue strength and the operational resource, to decrease the total repair and maintenance costs, to ensure better security and reliability of freight transportation through lower loads on both carrying structures and lashing devices, to increase the speed of freight delivery thanks to better dynamic characteristics of cars, to improve the traffic security, and so on. | ||
Попередній перегляд: 
Реферативна БД
 |
| Відділ наукової організації електронних інформаційних ресурсів |
 Пам`ятка користувача |