A decoupling procedure for the modal analysis of structures in contact with incompressible fluids

✍ Scribed by Antoniadis, I. ;Kanarachos, A.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1987
• Tongue: English
• Weight: 538 KB
• Volume: 3
• Category: Article
• ISSN: 0748-8025
• DOI: 10.1002/cnm.1630030611

✦ Synopsis

A decoupling procedure is described for the modal analysis of structures in contact with incompressible fluids. According to this procedure, the problem can be decoupled in two main subproblems, each defined only on the structure or the fluid domain. First, a set of basis vectors for the structural displacements-and the corresponding 'mass' and 'stiffness' terms-must be computed. Then a set of potential (Laplacian) problems for the fluid must be solved, using the structural basis vectors in the place of the structural displacements at the normal pressure derivative (Neumann) boundary conditions on the fluid-structure interface. If the 'in vacuum' structural eigenmodes are used as basis vectors, some important computational and physical advantages result. Numerical examples verify the efficiency of the approach.