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Evolutionary Optimization of Passive Compensators to Improve Earthquake Resistance
Abstract
Compensators are widely used to influence the dynamic response of excited structures. The coupling of additional masses with defined stiffness and damping to the vibrating elements reduces or avoids unwanted oscillations. In earthquake engineering, compensators often consist of one or a small number of such additional mass-spring combinations. To come up with a good design of the compensators, a multidimensional optimization problem has to be solved. As there might be many local optima, evolutionary approaches are the appropriate choice of the optimization strategy. They start with some basic designs. Then a sequence of generations of design variants is studied. The members of each generation are derived from the parent generation by crossing and mutation. The best kids are the parents of the next generation. Optimization results show that the use of compensating systems may essentially reduce the impact of an earthquake.
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