Fluid−structure Coupling Analysis And
Simulation Of A Slender Structure
Author(s)
A. Vasallo, A. Foces & A. Lorenzana
Abstract
The analysis of the interaction between the flow and the fluid and an object
represents a classical challenge for modern numerical techniques. Current work
will concentrate on the case of bluff-body cross-sections featuring sharp corners
and a clear predominance of the shape resistance over the friction resistance. For
this category of structures the dynamic behaviour of the overall coupled system
plays a very important role. In this work, the interest focuses on the behaviour of
a beam structure subjected to a flow orthogonal to the beam axis. Under this
assumption the flow at two points, at reasonable distance, will present little
correlation, which allows to consider the flow at one point as uncoupled from the
flow at other points along the same beam. This suggests the possibility of
\“slicing” the fluid domain in a number of independent two-dimensional planes
on each of which the problem can be solved separately. Conceptually the
solution on each slice will provide a force density acting on the beam, obtained
by integrating the pressure of the fluid over the corresponding cross-section. This
can be interpreted as a time-varying distributed load over the beam. The
aeroelastic analysis of a slender beam is performed coupling a Navier Stokes
Solver with the structural model. In the analysis of the structure is used a
monodimensional structural model applicable to thin−walled composite beams,
which can have either an open or closed profile with either a single- or multiplecell
section. However, in the application example presented here, a steel chimney
90 meters tall is analyzed.
Keywords: coupled problem, beam, thin-walled, one-dimensional model.
Keywords
coupled problem, beam, thin-walled, one-dimensional model.
Related Book
Other papers in this volume
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