9. F modeling

9.1. Characteristics of modeling

3D discretization of the beam with element HEXA8. Beam-wall contact is modeled by DIS_CHOC in explicit dynamics (with consistent mass matrix and lumped mass matrix).

The initial conditions and the boundary conditions are imposed through groups of nodes:

PAROI	(embedding the lower nodes of the contact element)
PLANSYMX	(symmetry conditions according to \(x\))
PLANSYMY	(symmetry conditions according to \(y\))
NOBARRE	(initial movements and speeds).

9.2. Characteristics of the mesh

Number of knots: 88

Number of meshes and types: 21 HEXA8