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Keywords
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Fluid-solid interaction, Random vibration, Viscoelastic
plate, Non-aging material, Monte Carlo simulation, Nonlinear behavior investigation
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Abstract
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Usually in studying the conventional fluid-solid interaction problems,
both the flow field and the solid structure must be jointly meshed and
solved. This takes a huge amount of iteration and time for calculation
even for simple specific examples. One of the most industrial elements
used in fuselage of aero-space systems is the plate whose instability and
behavior, especially in the case of large deformation, is so vital due to its
effect on the overall performance of the system. In this paper, utilizing
a new method that combines the CFD and Monte Carlo simulation, the
nonlinear behavior of a two dimensional simply supported non aging
viscoelastic plate located in a subsonic flow is investigated. First, relative to
the plate boundary conditions, the whole behavior of the plate is estimated.
Then, using CFD simulation, the flow field is solved for some various plate
deformations. This prepared a bank of data for the domain of plate response.
Due to the dynamic behavior of a turbulent flow which presents highly
nonlinear terms and disturbances; the aerodynamic forces are modeled
by some random forcing functions using statistical procedure. Finally,
using Monte Carlo simulation used for randomly excited ODEs, the forces
evaluated from CFD for each deformation are applied to the nonlinear
equation of motion of the plate and the behavior and possible instabilities
are investigated.
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