Vibrations in engineering and technology

Morachkovskii O. – Doctor of Technical Sciences, Professor, Head of the Department of Theoretical Mechanics, National Technical University «Kharkiv Polytechnic Institute» (2, Kyrpychova str., 61002, Kharkiv, Ukraine, e-mail: morachko@kpi.kharkov.ua).

Druzhynin E. – Candidate of Technical Sciences, Associate Professor of the Department of Theoretical Mechanics, National Technical University «Kharkiv Polytechnic Institute» (2, Kyrpychova str., 61002, Kharkiv, Ukraine, e-mail: druzhinin_e_i@ukr.net).

Bielomyttsev A. – Candidate of Technical Sciences, Associate Professor of the Department of Theoretical Mechanics, National Technical University «Kharkiv Polytechnic Institute» ( 2, Kyrpychova str., 61002, Kharkiv, Ukraine, e-mail: andrserg1@ukr.net)

Precise and approximate equations describing torsional oscillations in force transmissions containing a cardan shaft are considered in the article. Using approximate equations can significantly reduce the amount of calculations, in connection with which, they can be used to calculate models of power transmission of transport vehicles with many degrees of freedom. 

The results of numerical experiments showed that the perturbing forces acting on the cardan transmission elements and leading to high-frequency oscillations are caused by the kinematical and parametric oscillations of the cardan transmission itself from the effect of its rotation with time-varying oscillations of the angle of fracture of the axes of the connected cardan shafts, and also perturbations from the engine.

Based on the results of computational studies of the multi-mass model of an earth-moving caterpillar mashine containing cardan gear and comparing them with experiment, recommendations are given to reduce the level of dynamic loads in elements and components of the structure.

kardannym valom [Torsional vibrations of power transmissions with cardan shaft]. Izvestiya vuzov. Mashinostroyeniye – News of high schools. Mechanical engineering, 2, 98-102 [in Russian].

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