u3.14.02 3D models_ FLUIDE, FLUI_STRU, 2D_ FLUI_PESA

Summary:

This document describes for 3D models_ FLUIDE, FLUI_STRU, 2D_ FLUI_PESA:

• the degrees of freedom carried by the finite elements that support modeling,

• the related support meshes,

• the loads supported,

• non-linear possibilities,

• test cases implementing the models.

The 3D_ FLUIDE (volume elements) and FLUI_STRU (2D fluid-structure interaction elements) models correspond to the linear formulation of the coupled problem allowing the study of the vibratory behavior of a structure in the presence of a non-viscous, compressible fluid [R4.04.01]. The free surface is taken into account by 2D_ FLUI_PESA modeling (surface elements).

• 1. Discretization
  • 1.1. Degrees of freedom
  • 1.2. Support mesh for stiffness matrices
  • 1.3. Cargo support mesh
• 2. Supported loads
• 3. Nonlinear possibilities
  • 3.1. Laws of behavior
  • 3.2. Deformations
• 4. Example of implementation: test cases
  • 4.1. 3D_ FLUIDE
  • 4.2. FLUI_STRU
  • 4.3. 2D_ FLUI_PESA