Agricultural Engineering, Volume 53 (2021)

INVESTIGATION OF MEASUREMENT OF LARGE AMPLITUDE VIBRATIONS BY USING THE METHOD OF REFLECTION MOIR

Rimas Maskeliūnas, Kazimieras Ragulskis, Arvydas Pauliukas, Petras Paškevičius, Algimantas Bubulis, Kuzhel Volodymyr, Liutauras Ragulskis
Vilnius Gediminas Technical University; Kaunas University of Technology; Vytautas Magnus University; Company “Vaivora”; Kaunas University of Technology; Vinnytsia National Technical University; Vytautas Magnus University

Abstract

This paper is a full article on the basis of the material presented in a conference paper. In agricultural devices vibrations of high frequency take place. Their precise measurement is an important engineering problem. Time averaged moiré methods are used for this purpose. Reflection moiré is applicable for the measurement of bending vibrations of structures of plate or beam type. Conventional applications are for small amplitude vibrations and interpretation of results is performed in the usual way. But interpretation of results is more complicated when the amplitudes of vibrations are large. Investigation of time averaged reflection moiré measurements of large amplitude vibrations of a simplified model problem is performed in this paper. For this purpose, a special simplified one-dimensional numerical model is developed and the possibilities of application of this method of measurement of large amplitude vibrations are investigated.

Keyword(s): one-dimensional model, large amplitude vibrations, time averaged moiré, reflection moiré, measurement of vibrations.


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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.