NUMERICAL STUDY OF A MULTI-DEGREE OF FREEDOM STRUCTURE UNDER THE INFLUENCE OF WIND EXCITATION.

Resumo

Nonlinearity is always present in the most diverse real structures, so the more reliable the computational
numerical modeling of these structures, the more one must consider the nonlinearities present. This paper aims
to study the nonlinear dynamics of a structure under the action of wind force based on a structure with multiple
degrees of freedom (shear building) with the addition of a duffing spring, which introduces nonlinearity to the
system, where the external force will be implemented through the wind force applied to one of the floors of the
structure. The entire analysis will be performed through the numerical integration of the ordinary differential
equations, thus obtaining the response in the time domain, and through transforms, such as the continuous wavelet
transform (cwt), extract the signal in the frequency domain, allowing to observe phenomena that are not possible
to observe in the time domain, thus having a complete analysis of the system behavior.