SciELO - Scientific Electronic Library Online

 
vol.24 issue4Hot tool temperature analysis though infrared imagesOn-site calibration of a phase fraction meter by an inverse technique author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Journal of the Brazilian Society of Mechanical Sciences

Print version ISSN 0100-7386

Abstract

PALACIOS, J. L.; BALTHAZAR, J. M.  and  BRASIL, R. M. L. R. F.. On non-ideal and non-linear portal frame dynamics analysis using bogoliubov averaging method. J. Braz. Soc. Mech. Sci. [online]. 2002, vol.24, n.4, pp. 257-265. ISSN 0100-7386.  http://dx.doi.org/10.1590/S0100-73862002000400002.

We apply the Bogoliubov Averaging Method to the study of the vibrations of an elastic foundation, forced by a Non-ideal energy source. The considered model consists of a portal plane frame with quadratic nonlinearities, with internal resonance 1:2, supporting a direct current motor with limited power. The non-ideal excitation is in primary resonance in the order of one-half with the second mode frequency. The results of the averaging method, plotted in time evolution curve and phase diagrams are compared to those obtained by numerically integrating of the original differential equations. The presence of the saturation phenomenon is verified by analytical procedures.

Keywords : Internal resonance; saturation phenomenon; averaging method; non-ideal system.

        · text in English