Submerged Structural Response to Weak Shock by Coupled Three-Dimensional Retarded Potential Fluid Analysis - Finite Element Structural Analysis

摘要

The discretized Kirchhoff retarded potential integral equation for solving the linear acoustic wave equation is coupled to a general finite element structural analysis code to model underwater vibrations. Arbitrary three dimensional problems can be handled, with a present restriction on the allowed orientation of the finite element grid lines and the requirement of a plane wave form. Ramp and Fourier series approximations to a step wave are applied to rigid and elastic spheres to test the numerical formulation, and to test the validity of using a continuous approximation to a discontinuous loading. Keywords: Potential integral, Field analysis, Coupled, Fluid structure interaction, Submerged, Structural response.