Evaluación del desempeño de un amortiguador de masa sintonizado no lineal mediante simulaciones híbridas en tiempo real

Abstract

Introduction: In this paper, the real-time hybrid simulation (RTHS) of a non-linear tuned mass damper (NTMD) is described, and the results are compared with those obtained from conventional experimental tests of a one-story shear frame structure with the NTMD.

Objective: The aim of this article is to evaluate the effectiveness of a RTHS for the estimation of the performance of a NTMD.

Method: the methodology consisted of the following three stages: main structure identification, NTMD design, and experimental evaluation of the structure-NTMD system. For the third stage, both real-time hybrid simulations and shaking table testing were conducted. 

Results:  results from shaking table tests demonstrate that the NTMD reduced the peak and RMS accelerations of the main structure 77% and 63% respectively, with respect to the structure without control. The values of these reductions obtained with RTHS were 73% and 63%, respectively. The assessment indices of the transfer system correspond to a generalized amplitude of 1.01 and a delay of 2 ms. 

Conclusions: the NTMD, with a 10% mass ratio, achieved reductions greater than 60% in the acceleration response of the structure. The RTHS and shaking table test indicated that the structure-NTMD system had only one peak in the frequency response. Noise in RTHS feedback increased the damping level of the controlled structure. Finally, experimental results showed that the RTHS is a technique that predicts effectively the RMS acceleration of the structure-NTMD system, and it can slightly overestimate its peak acceleration.