A simple sloshing type of damper consists of a tuned rectangular tank filled to a certain level with water. The tuning of the system consists of matching the tank's natural period of wave oscillation to the building's period by appropriate geometric design of the tank. If obstacles such as screens and baffles are placed in the tank, dissipation of the waves takes place when water sloshes across these obstructions resulting in a behavior similar to that of a TMD, and the result is again that the tank behaves as a TMD. However, analysis indicates that a sloshing water tank does not make as efficient use of the water mass as a tuned liquid column damper.
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