Evaluation of Autoparametric Vibration Absorbers on N-Story Building-Like Structures

Abstract

This work deals with the application and evaluation of passive and active autoparametric vibration absorbers on primary systems, consisted of N-story building-like structures, affected by harmonic excitation forces, close to different primary resonance conditions. First, the N-story building-like structure can be modeled and characterized via Euler-Lagrange formulation, finite element methods or by means of experimental modal analysis techniques. Second, the autoparametric vibration absorber can be coupled and designed appropriately to attenuate the overall system response on the primary structure. For the passive design, approximate nonlinear frequency response functions are obtained using the method of multiple scales. In addition, the dynamic performance and robustness of the autoparametric vibration absorber can be improved using feedback and feedforward information from the primary system, and synthesized on active vibration control schemes. The overall dynamic performance is experimentally validated on a 6-story building-like structures and a cantilever-type autoparametric absorber, resulting in good attenuation properties.