Response of Water Tower on Wind Induced Vibration Considering Interaction of Fluid and Structure

Abstract:

The paper deals with the numerical analysis of forced vibrations of a slender water tower structure. The computation model has been developed using finite elements in the ANSYS program environment. For CFD (Computational Fluid Dynamics) analysis the CFX module was used. The computation model includes the precisely modeled thin-walled steel structure and two variants of fluid domain. Elements FLUID30 formulated for direct description of the fluid pressure field has been applied and Lagrange description FLUID80. The Raleigh’s model of energy dissipation has been used. Similarity of normal modes of vibration has been applied as the criterion for defining the relations between computed natural frequencies of the empty tank and filled with water. To obtain accurate wind induced forces the CFD model of air surrounding was modeled. From this model the relation between velocity of unaffected stream and vortex separation frequency. Forced vibrations of the tower excited by vortex shedding harmonic pulsations have been computed.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 1269-1272
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.1269
• Online since: January 2013
• Authors: Jiri Kala, Vlastislav Salajka, Petr Hradil
• Keywords: Euler Fluid, Fluid Structure Interaction (FSI), Lagrange Fluid, Steel Structure, Wind Load

References

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