Coupled Calculation of the Airflow Interaction with Elastic Rod of Square Cross Section

The paper presents the results of numerical modeling of vibration of an elastic rod mounted normal to external flow and fixed rigidly to a substrate. The simulation is performed with ANSYS software using the technology of bidirectional coupling (2FSI). The hydrodynamic, conjugate and modal analysis have been performed. The structure of the air flow in the vicinity of the model was analyzed. The oscillations of the elastic model were revealed and the stress strain state was obtained. The natural frequencies of the rod and corresponding vibration shapes are found. To prevent undesired vibrations of elastic structures which can lead to their destruction, the interaction of structures with external air flow must the considered. Related physical processes in which movement of the air has an impact on the behavior of deformable objects (Fluid Structure Interaction, FSI) are a key element in many engineering problems of aviation and civil engineering. Aeroelasticity phenomenon must be considered when creating modern aircraft, designing high-rise and extended buildings.