Application of the Finite Element/Boundary Element Approach to the Analysis of Radiation and Scattering from Fluid-Loaded Elastic and Piezoelectric Structures.
Abstract
To understand the behavior of realistic fluid loaded elastic or piezoelectric structures, it is often necessary to use numerical techniques. The approach chosen by many Navy modelers has been to combine a finite element model of the structure with a combined Helmholtz integral equation formulation (CHIEF) boundary element model of the wetted surface. CHIEF computes a matrix that describes the interactions through the fluid of the elements on the wetted surface. The CHIEF matrix can be combined with the structural matrices from any finite element program to obtain the fluid loaded response, in the frequency domain, of a device or structure. This approach has been used to compute the harmonic response to mechanical force, an applied potential, and an incident acoustic plane wave. The most recent enhancement to the finite element/CHIEF combination is the estimation of the in fluid eigenfrequency of a Specific mode of the structure. Some of these procedures have been documented in various Navy reports, while the most recent applications have been described in journal articles. The purpose of this document is to present all the procedures in one publication, and explain and demonstrate their use for the benefit of the prospective modeler or designer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 15, 1996
- Accession Number
- ADA311761
Entities
People
- Michele D. Mccollum
- Robert E. Montgomery
Organizations
- Naval Undersea Warfare Center