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Partitioned-coupling FSI analysis with active control
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DOI：10.1007/s00466-017-1422-3.png)
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Fluid-structure interaction (FSI) is an interdependent phenomenon between a fluid and a structure that affects their dynamic behavior. It is important because it often affects the safety and lifetime of structures. Therefore, controlling FSI is important. In the study of the control of FSI, numerical simulations are often used because they are suitable for parametric studies and reduce the need for experiments. A number of numerical studies have examined the control of FSI. However, existing numerical studies have rarely performed both fluid and structural analyses strictly and sufficiently treated interaction conditions on the coupling interface. Therefore, the types of FSI problems that can be analyzed are limited. In order to enable the treatment of a greater variety of FSI problems, it was necessary to develop a new method. The partitioned iterative method has succeeded in analyzing complicated FSI problems, and, in the present study, we propose FSI analysis considering active control by integrating FSI analysis by a partitioned iterative method and an active control algorithm. We explain the proposed method, and we validate the method by solving two-dimensional vortex-induced vibration (VIV) of an elastically mounted cylinder with active control of a velocity feedback. Furthermore, we present an application example by solving the suppression of two-dimensional VIV of a flexible structure in the wake of a bluff body.
Keyword:
Fluid-structure interaction
Partitioned iterative method
Active control
Vortex induced vibration
Finite element method
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Closed-loop-controlled vortex shedding and vibration of a flexibly supported square cylinder under different schemes.png)
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