Temat: grading - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of electric field control methods for foil coils in high-voltage linear actuators
Autorzy:: Beek, T. A. van
Jansen, J. W.
Lomonova, E. A.
Powiązania:: https://bibliotekanauki.pl/articles/141173.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: electric field control methods
high voltage
linear actuators sensitivity analysis
stress grading
Opis:: This paper describes multiple electric field control methods for foil coils in high-voltage coreless linear actuators and their sensitivity to misalignment. The investigated field control methods consist of resistive, refractive, capacitive and geometrical solutions for mitigating electric stress at edges and corners of foil coils. These field control methods are evaluated using 2-D boundary element and finite element methods. A comparison is presented between the field control methods and their ability to mitigate electric stress in coreless linear actuators. Furthermore, the sensitivity to misalignment of the field control methods is investigated.
Źródło:: Archives of Electrical Engineering; 2015, 64, 4; 629-640
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A laboratory study of pressure distribution and residual settlements in wide grading double layer railway ballast under long-term cyclic loading
Autorzy:: Sysyn, M.
Gerber, U.
Nabochenko, O.
Dehne, S.
Powiązania:: https://bibliotekanauki.pl/articles/1849767.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: podsypka kolejowa
podsypka dwuwarstwowa
zachowanie
obciążenie długotrwałe
obciążenie cykliczne
osiadanie
ciśnienie
rozkład ciśnienia
railway ballast
long-term behaviour
permanent settlement
ballast grading
pressure
pressure distribution
Opis:: Ballast layer has weighty share in the lifecycle costs of railway track. The strict standards and maintenance rules of ballast grading significantly contribute to the ballast costs. One ways to the costs reduction is differential demands to ballast grading for the secondary and low loaded railway lines. Additional one is the different ballast grading over the ballast height. This study presents a full scale laboratory investigation of technical efficiency of such railway ballast under the long-term cyclic loading in comparison with the standard ballast layer. The double layer is presented with standard grading ballast upper layer and bottom sub ballast layer consists of ballast mixture. Pressure distribution under the ballast layer and permanent settlements of the layers are measured during the loading cycles. The reference measurements with standard grading ballast material are carried out. The study shows that initial settlement accumulation of the double layer railway ballast are lower to that of the standard ballast layer. However, the settlements accumulation intensity of the ballast is higher. The analysis of the pressure distribution measurements under the ballast layer and the settlements inside the ballast layer explain the causes of the different settlement accumulation.
Źródło:: Archives of Civil Engineering; 2020, 66, 4; 561-578
1230-2945
Pojawia się w:: Archives of Civil Engineering
Dostawca treści:: Biblioteka Nauki

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