Approximate methods in fluidstructure interaction problems
Abstract
Some approximate methods of calculating the response of structures submerged in an infinite acoustic fluid are considered. A characteristic body dimensioned, and corresponding fluidstructure interaction time t bar, are defined by t bar = d/c; cis the sound velocity in the fluid. The approximation proposed is a generalization of the hydrodynamic function for a rigidbody translation of a sphere. This allows the impedance offered by the fluid to be modelled by the driving point impedance of an equivalent mechanical circuit consisting of a mass, spring, and dapmer. Formulas are given for determining the values of these mechanical elements. To test the quality of the proposed approximation, it is compared to the hydrodynamic functions appropriate to translating cylinders, strips, and unbaffled discs.
 Publication:

Ph.D. Thesis
 Pub Date:
 August 1977
 Bibcode:
 1977PhDT........98C
 Keywords:

 Acoustic Velocity;
 Integral Equations;
 LiquidSolid Interfaces;
 Submerged Bodies;
 Acoustic Streaming;
 Approximation;
 Fluid Dynamics;
 Functions (Mathematics);
 Hydrodynamic Equations;
 Fluid Mechanics and Heat Transfer