MECHANICAL VIBRATIONS STUDY PRODUCED BY MACHINE-TOOLS OVER A HUMAN OPERATOR, WHO SERVES IT. PART I: OPERATOR MECHANICAL CHARACTERISTICS AND THE SYSTEM OF DIFFERENTIAL EQUATIONS

Adela Bianca CRACIUN (HOSU), Ovidiu Aurelian DETEŞAN, Mariana ARGHIR

Abstract


The paper is part of the doctoral thesis of the first author, in which the action of vibrations on an operator serving a machine tool during the production process is studied. In this paper, the theoretical study of the transmission of vibrations from the machine tool through the operator's feet is carried out, which is placed on a pedestal on which there is a rubber mattress. It is considered the vertical vibrations, through both legs, up to the abdomen, which summarize them and form together with the upper part of the body an undeformable system. In the first part of the paper, the mechanical model of the material system, assimilated to the two legs, as well as the mechanical characteristics of the segmental component parts, are presented. The mechanical diagram of the system is drawn up in its entirety and on the elements, then the system of differential equations is written, which governs the vibratory movement of the material system, during the machining process on the machine tool


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References


Potîrniche, AM; Vasile, O; Capatana, GF, Modal Analysis of a Mechanical System Modeled as a 6 Degrees-of- Freedom Solid Body with Elastic Bearings and Structural Symmetries, Romanian Journal of Acoustics and Vibration, 2022, Vol. 19, Issue 1, pp.36-40

Zhivomirov, H; Nedelchev, I, A method for signal stationarity estimation, Romanian Journal of Acoustics and Vibration, 2020, Vol. 17, Issue 2, pp. 149-155;

Stanescu, ND, Multibody Systems - approaches and challenges, , Romanian Journal of Acoustics and Vibration, 2020, Vol. 17, Issue 1, pp. 2-2;

Stan, AF; Pandrea, N; Stanescu, ND, On the dynamics of the constrained rigid solid acted by conservative forces. part I: Theory, Romanian Journal of Acoustics and Vibration, 2020, Vol. 17, Issue 1, pp. 3-9;

Bratu, P; Buruga, A; Chilari, O; Ciocodeiu, AI; Oprea, I, Evaluation of the linear viscoelastic force for a dynamic system (m, c, k) excited with a rotating force, Romanian Journal of Acoustics and Vibration, 2019, Vol. 16, Issue 1, pp. 39-46;

Alexandra-Maria Macovei, Studii și cercetări privind mediul vibrational produs de utilajele din industria alimentară cu acțiune asupra operatorului uman, Teză de doctorat, Universitatea Tehnica din Cluj-Napoca, 2019

Mariana Runcan, Mărimi cinematice și măsurări locale și globale în intercațiunea om-structură, Teză de doctorat, Universitatea Tehnică din Cluj-Napoca, 2010.

Aurica Truta, Modelări biomecanice ale organismului uman sub acțiunea vibrațiilor mecanice produse de mașini și utilaje în mediul de lucru, Teza de doctorat, 2009, Universitatea Tehnică din Cluj-Napoca


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