Simulation Of The Fluid Structure Interaction For
An Aerostatic Bearing And A Flexible Substrate
Author(s)
R. Olieslagers, M. de Wild, S. van Melick, & R. Knaapen
Abstract
The fluid structure interaction for an aerostatic bearing and a substrate is solved
numerically by a semi-analytical model, programmed in the software package
MATLAB. This semi-analytical model uses a fluidic network of resistances and
capacities to solve the pressure field in the bearing channel. These pressures are
sent to a mechanical module, which computes the substrate deformations by the
direct stiffness method. This semi-analytical model is verified by a second
model, built into the commercial software package ANSYS. The ANSYS model
includes a two-way coupled FEM and FVM solver. Position and time-dependent
bearing height variations are computed by means of a dynamic mesh. The
implementation of the semi-analytical model is done and verified by three cases.
The first case verifies the pressure profile inside a parallel plate configuration
with a moving top wall. The last two cases verify the time-dependent position of
a rigid and flexible substrate supported by an aerostatic bearing. The semianalytical
model is proved to be an effective tool for aerostatic bearing design,
since it is able to solve the FSI within a couple of minutes instead of days for a
coupled FEM and FVM solver
Keywords: aerostatic bearings, air film squeeze flow, fluid structure interaction,
web handling, Euler Bernoulli theory, discrete stiffness method.
Keywords
aerostatic bearings, air film squeeze flow, fluid structure interaction,
web handling, Euler Bernoulli theory, discrete stiffness method.
Related Book
Other papers in this volume
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