v2.04.104 SDLV104 - Fixed Developer Error DEFI_BASE_MODALE with the « ORTHO = OUI » option

Summary:

We show the ability of the DEFI_BASE_MODALE command to concatenate and orthonormalize two vector families simultaneously (keyword RITZ and operand ORTHO).

The use of the operand “ORTHO = OUI” will be validated on a dynamic transient calculation on a modal basis enriched with static modes. A calculation on a sound basis, without recourse to the option “ORTHO = OUI”, will be used as a reference solution.

We consider the study of a slender beam with several blockages subjected to an instantaneous force with a triangular temporal profile.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions
  • 1.4. Loads
  • 1.5. Meshing
  • 1.6. Method
• 2. Benchmark solution
• 3. Summary of results