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Recommendation for the design of composite covers which protect the chassis of a rail vehicle

Juzuń Mateusz, Cholewa Wojciech

Vibrations in Physical Systems

2020

Vol. 31, nr 1

art. no. 2020107

Fragments of research to formulate criteria allowing for the rational design of covers to protect against the destructive impact effects of small, sharp elements, are discussed. The motivation for this research was the result of the analysis of damage to composite covers which protect the chassis of a modern traction vehicle, moving at high speed on Polish railway routes. Such covers must have appropriate strength properties and high surface resistance to external damage, while limiting the influence of the impact of foreign elements on the cover, and the impact of external sources of noise and vibrations on the interior of the vehicle. They have a sandwich structure and are made of a polymer composite. General guidelines for the design of covers having the required properties are not known. A method of analyzing the resistance of the cover to damage associated with the impact of elements with sharp edges and irregular shapes, using the LS-Dyna software, has been proposed. For the needs of the proposed method, a general model of the cover structure has been introduced. The assumptions adopted in determining the field of possible solutions are discussed. Particular attention is paid to the required structure of the cover, allowing for the differentiation of its properties observed in the longitudinal and transverse directions of the vehicle. Selected conclusions resulting from the research carried out so far, are presented.

Charakterystyki wibroakustyczne i termiczne wybranych materiałów poszycia ścian kabin

Dziechciowski Z.

Czasopismo Techniczne. Mechanika

2012

R. 109, z. 8-M

15--26

W artykule przedstawiono teoretyczną analizę właściwości materiałów znajdujących zastosowanie w budowie kabin maszyn roboczych, która może pozwolić na odpowiedni dobór materiałów poszycia w aspekcie łącznej oceny komfortu wibroakustycznego i termicznego na stanowisku pracy operatora maszyny.

This paper presents the theoretical analysis of materials properties use in cabins structure of heavy duty machines which allow to select suitable plate components of cabin walls in aspect of combined assessment of vibroacoustic and thermal comfort in the workplace of the machine operator.