Stochastic Response of Structures with Appendages Containing Fluids

by Wei-Joe Sun, Univ of Houston, Houston, TX, USA,
Ahsan Kareem, Univ of Houston, Houston, TX, USA,



Document Type: Proceeding Paper

Part of: Dynamic Response of Structures

Abstract:

Following a perturbation technique a procedure is developed to compute the modal properties of a system consisting of a fluid containing appendage attached to a multi-degree-of-freedom system. The formulation includes the effect of interaction between the secondary and the primary systems that is particularly noteworthy when a modal frequency of the sloshing fluid is tuned to a natural frequency of the structure. The methodology is illustrated using a numerical example of a 10-story building with a water tank as the secondary appendage. The dynamic response analysis suggests that an optimally tuned tank acts as a tuned mass damper in reducing the response of the building.

Subject Headings: Dynamic loads | Stochastic processes | Fluid-structure interaction | Fluid mechanics | Wind loads | Natural frequency | Structural dynamics

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