CONFERENCE PROCEEDINGS
6th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2018 , 2018.y., pp. 125-131
VIBRATION ABSORBER OF SEISMIC ACTIONS IN BUILDINGS
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| DOI: 10.14415/konferencijaGFS2018.010 |
| UDC: 534.28:519.6 |
| CC-BY-SA 4.0 license |
| Author : Cvetićanin, Livija; Rakarić, Zvonko; Zuković, Miodrag |
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| | Summary: |
| | Various mthods for elimination vibrations cased by seismic perturbation are
developed. Beside the passive vibration absorbers significant number of active vibration
absorbers are suggested. Unfortunately, these are extremely expensive due to the fact
that they work randomly but their maintance has to be continual. It gives the priority to
development of passive absorbers. In this paper we suggest a new type of nonlinear
absorber based on the piano-wire vibration concept. The absorber is connected to the
floor element. It contains a straightforward translatory moving mass settled on a steel
wire installed in the direction perpendicular to slider motion. Due to slider motion in the
wire a restoring force occurs. The force is a nonlinear deflection function. Using the
principle of elimination of building motion, parameter of nonlinearity is computed. The
model of the system are two coupled second order nonlinear differential equations. The
nonlinearity is of cubic order. Based on the exact steady state solution that corresponds
to nonlinear resonant vibration, we developed an approximate solving method for the
perturbed equations. Finally, the conditions for vibration elimination are computed. |
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| | Keywords: |
| | Passive absorber, piano-wire concept, nonlinear resonant vibration, Jacobi
elliptic function |
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