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In this scientific description are introduced chosen kinds of initial technological imperfections which occur in thin board's coats and also in bent coats. Using the MSC.Nastran system, presented imperfections are described and their influence on a form of the stability's loss and an overcritical work of boards nad coats are analysed.
W referacie przedstawiono wyniki obliczeń wytrzymałościowych przeprowadzonych z wykorzystaniem metody elementów skończonych ostoi wagonu czteroosiowego 412Ka. Obliczenia przeprowadzono dla przypadków obciążeń zdefiniowanych wg karty UIC/OSŻD/49 punkt 2.1- wymagań wytrzymałościowych kolei 1520 mm. Wykonano obliczenia statyki liniowej oraz liniowej utraty stateczności.
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