Agricultural Engineering, Volume 44, Number 2

VIBRATIONS OF A BOX OF PACKAGES EXCITED BY NON-UNIFORMITIES OF THE ROAD PROFILE

Laura Gegeckienė, Edmundas Kibirkštis, Valdas Miliūnas, Arvydas Pauliukas, Kazimieras Ragulskis, Liutauras Ragulskis
Kaunas University of Technology

Abstract

The first eigenfrequencies of the packages in the non-deformable box have been determined as well as the forced frequencies excited by the non-uniformities of the road. In order to avoid big overloads it is recommended to choose the velocity of motion in such a way that the difference between the eigenfrequencies and the forced frequencies would be maxmin.
Eigenmodes of ten rows and ten columns of packages in a box are analyzed. A package is represented as a single plane strain element. Interconnection of packages is assumed by special elements which ensure continuity of the normal displacement by the penalty method.
Eigenmodes of ten long packages in a box are analyzed. A long package is represented as consisting from ten plane strain elements.
The influence of vibrations in the process of transportation of packages is analyzed by taking the non-uniformities of the road profile into account. The main structure of the performed investigation is presented here, while the detailed optimal synthesis and results of experimental investigations are the subjects of other papers.

Keyword(s): Road, non-uniformity, forced frequencies, package, box, plane strain, eigenmodes, vibrations, finite elements, penalty method, interconnecting element, long package.


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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.