DETERMINATION OF INSOLATION PARAMETERS OF MACHINE AGGREGATE ”ELECTRIC ENGINE-COMPRESSOR”

Anastas Ivanov Ivanov; Penko Petkov Cvetkov

Scientific paper ID 1494 : 2017/3

DETERMINATION OF INSOLATION PARAMETERS OF MACHINE AGGREGATE ”ELECTRIC ENGINE-COMPRESSOR”

Anastas Ivanov Ivanov, Penko Petkov Cvetkov

In this paper the forced three dimensional vibrations of a machine unit mounted on the wagons of the electric modular trains are studied. The unit is suspended on three vertical supports to the wagon frame. A vibrating isolation assembly is constructed at the top end of each carrier. The unit is accepted as an ideal rigid body. The bearers along with the vibrating insulating knots are considered to be perfectly elastic and immaculate. The first stage of this study was carried out, and it involved the task of determining eigen frequencies and eigen forms. The present work is a second stage and is related to the study of forced vibrations of the same aggregate. They arise from the unbalanced masses and the inertial forces generated by the piston compressor operating cycle. The paper shows the mathematical model of the unit and the differential equations in the matrix form describing the small three dimensional forced vibrations. The main objective of the study is to identify damping in the system. It consists of three vibrating insulating units consisting of successively and in parallel working rubber shock absorbers and metal connecting elements. Recordings of hysteresis curves obtained from laboratory tests of exploited and new dampers were used. For each vibrating isolator, the absorption coefficient is determined, followed by the damping coefficients.

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принудени пространствени трептения машинен агрегат хистерезис демпфериране виброизолиране числено решение MatLabforced three dimensional vibrations machine aggregate hysteresis damping vibration isolation numerical solution MatLabAnastas Ivanov Ivanov Penko Petkov Cvetkov

BIBLIOGRAPHY

[1] Angelov I. V., Vibroizolatori, Katalog, konstruktsii i harakteristiki, 148 str., Izd. „Tehnicheski Universitet”, Sofiya, 1993 g.
( [1] Ангелов И. В., Виброизолатори, Каталог, конструкции и характеристики, 148 стр., Изд. „Технически Университет”, София, 1993 г. )

[2] Angelov I. V., V. G. Ovcharov, Vibratsii i shum v transportnite sredstva, 271 str., Izd. “Tehnika”, Sofiya., 1985 g..
( [2] Ангелов И. В., В. Г. Овчаров, Вибрации и шум в транспортните средства, 271 стр., Изд. “Техника”, София., 1985 г.. )

[3] Ivanov A. I., P. Ts. Petkov, Modelirane na svobodnite trepteniya na agregata “elektrodvigatel-kompresor” na elektricheski motrisen vlak, sp. “Mashinostroene”, kn. № 7-8, Godina LII (nauchen broy), str. 6 – 10, 2003 g.
( [3] Иванов А. И., П. Ц. Петков, Моделиране на свободните трептения на агрегата “електродвигател-компресор” на електрически мотрисен влак, сп. “Машиностроене”, кн. № 7-8, Година LII (научен брой), стр. 6 – 10, 2003 г. )

[4] Ivanov A. I., P. Ts. Petkov, Vliyanie na ogavatelno-usukvatelnite koravini na vibroizolatorite varhu sobstvenite chestoti na mashinen agregat, sp. “Zhelezopaten transport”, broy 1/2004, str. 39 – 41, Sofiya, 2004 g.
( [4] Иванов А. И., П. Ц. Петков, Влияние на огъвателно-усуквателните коравини на виброизолаторите върху собствените честоти на машинен агрегат, сп. “Железопътен транспорт”, брой 1/2004, стр. 39 – 41, София, 2004 г. )

[5] Lyapunov V. T. i dr., Rezinovyye vibroizolyatory, Spravochnik, 216 str., Izd. „Sudostroenie”, Leningrad, 1988 g.
( [5] Ляпунов В. Т. и др., Резиновые виброизоляторы, Справочник, 216 стр., Изд. „Судостроение”, Ленинград, 1988 г. )

[6] Frolov K. V. i dr., Vibratsii v tehnike, spravochnik v 6 tomah, tom 6, Zashtita ot vibratsii i udarov, 456 str., Izd. „Mashinostroenie”, Moskva, 1981 g.
( [6] Фролов К. В. и др., Вибрации в технике, справочник в 6 томах, том 6, Защита от вибрации и ударов, 456 стр., Изд. „Машиностроение”, Москва, 1981 г. )

[7] Elektrokompressor “EK 7V”, 23 str., Instruktsiya po ekspluatatsii, Moskva, 1972 g.
( [7] Электрокомпрессор “ЭК 7В”, 23 стр., Инструкция по эксплуатации, Москва, 1972 г. )

[8] Ivanov A. I., Three dimensional vibrations of aggregate connected with elastic elements, pp. 37-42, Tehnomus Journal, University of Suceava, Romania, 2017.