Hydrodynamic forces on composite structures
Loading...
Authors
Millhouse, Scott C.
Subjects
Fluid structure interaction
FSI
finite element
finite volume
ANSYS
E-glass
composite material
coupled interaction
transient acceleration
transient fluid
transient velocity
transient stress
transient force
towing tank.
FSI
finite element
finite volume
ANSYS
E-glass
composite material
coupled interaction
transient acceleration
transient fluid
transient velocity
transient stress
transient force
towing tank.
Advisors
Kwon, Young W.
Date of Issue
2014-06
Date
June 2014
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
Using a tow tank environment an experiment was set up to measure for response of composite samples of varying stiffness to a geometrically comparable more rigid aluminum sample which was tested at increasing speeds. Also, a square composite shape was tested in a frame providing clamped boundary conditions. Testing of this sample over varying speeds was also performed at varying position angles and was analyzed for force, strain and flow visualization. Results show complex behaviors in fluid flow and structural deformation because of the effects of the free surface and fluid-structure interaction. The comparable mass density between composite plates and water results in pronounced fluid structure interaction. Proximity to the free surface highly influences the test data along with the position angle. Negative position angles in combination with high speeds result in an air pocket open to the atmosphere which translates to a sharp decrease in strain on the sample. Positive position angles yields different free surface effects including vortices and the onset of cavitation.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.