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Fully-coupled fluid-structure analysis of a baffled rectangular orthotropic plate using the boundary element and finite element methods
Laminated composite plates have become an important and proven structural material
in aerospace and ocean vehicles. However, because of the inherent orthotropy of
laminated composite materials the analysis of these structures is complex and usually
cannot be adequately performed using classical methods. In this dissertation the formulation
of the fully coupled fluid-structure interaction of a laminated composite plate
and its surrounding fluid medium is presented. The solution technique involves the finite
element method for modeling the structural response and the boundary element method
for modeling the acoustic field. The model incorporates the Mindlin plate theory which
includes five degrees of freedom. An improved integration technique is demonstrated
which significantly reduces the approximation error. Storage requirements are reduced
by grouping complex numbers. Finally the fully coupled fluid-structure interaction involving
laminated composite plates is modeled using the combined FEM-BEM approach
demonstrating the usefulness and the significance of the method.