ANALYSIS ON CONTROL OF FLOW-INDUCED VIBRATION BY TUNED LIQUID DAMPER WITH CROSSED TUBE-LIKE CONTAINERS

Probabilistic characteristics of response of a multi-storey structure with tuned liquid dampers (TLD) installed in one or some of the floors due to random dynamic loads are investigated. The tuned liquid damper consists of crossed tube-like containers of nonlinear characteristics of energy dissipation. A new version of stochastic linearization appr oach is applied to solve the nonlinear vibration of the structure and the liquid in the containers. Specifically, the nonlinear vibration sy stem is replaced by an equivalent system in terms of the criterion of minimal mean square deviation of generalized energies between these tw o systems. Examples given show that the modified stochastic linearizat ion approach is closer to the exact solution than the conventional one . Finally, the effects of the tuned liquid damper on the structural re sponse are identified.