Acoustic fluid volume modeling by the displacement potential formulation, with emphasis on the wedge element

Abstract

This paper studies three-dimensional finite elements for modeling acoustic fluid volumes using the displacement potential formulation. These elements find application in shock and vibration analysis of fluid-structure interaction problems such as submerged structures and flexible containers. The paper concentrates on the derivation and implementation of the six-node wedge element because of its unconventional nature. This element is validated on the Bleich-Sandler problem of fluid-structure transient analysis.