v8.01.104 FDLV104 - Mass calculation added on a 3D generalized model

Summary:

This test in the field of fluids (fluid/structure coupling) validates the calculation of mass added to a generalized 3D model, namely two spheres coupled by an incompressible fluid.

By a modal analysis carried out by dynamic substructuring, the coupled modes of the two spheres are obtained because of the presence of the fluid. The natural frequencies are compared to those determined by a direct calculation.

The natural frequencies are obtained to within 3%.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
• 2. Benchmark solution
  • 2.1. Calculation method used for the reference solution
  • 2.2. Benchmark results
  • 2.3. Uncertainty about the solution
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Tested values
  • 3.4. notes
• 4. Summary of results