How do the shock absorbers work for the seismic protection of buildings? Investigation of the question by numeric simulations. Part 2.

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Rubric:     Theoretical and experimental studies   
Annotation:
A computer study on seismic protection is presented. Part 1 has shown that passive rubber-like shock absorbers in the foundations of buildings are often not effective enough. The purpose of this work is to look at the possibility of applying an unconventional approach for seismic protection tasks. A model task is used to change the resonant properties of the protected object by applying a passive multifrequency dynamic vibration absorber. Indeed, in the absence of specific information on a possible earthquake under a particular building – on the direction of its impact, on its frequency components, which can coincide with the resonant frequencies of the protected building, etc., how to protect the object? Computer simulation showed that if the damper considered in Part 1 is used as a passive multifrequency dynamic absorber, placed on the roof of the building, then it is possible to obtain a noticeable effect of reduced resonant peaks.