5. C and D modeling

5.1. Characteristics of the models

In these models, modeling A is reused to test a more complex form of the buckling law. Modeling C is without shock damping, while for modeling D damping is added.

The system is modelled with a material point and a PLAN_Y obstacle.

The quantities obtained following buckling due to shock are evaluated using the keyword FLAMBAGE of the operator DYNA_VIBRA.

We also check the various resolution methods (EULER, ADAPT_ORDRE2 and DEVOGE). With the adaptive time diagram ADAPT_ORDRE2 we define (in seconds):

• the initial time step: PAS = 0.0002,

• the maximum value of the time step: PAS_MAXI = 0.001,

• the minimum value of the time step: PAS_MINI = 2.E-8.

5.2. Characteristics of the mesh

Number of knots: 2

Number of mesh: 1 SEG2

5.3. Tested sizes and results

The values of the quantities associated with the buckling of the wall are tested.

C modeling:

Identification	Reference	T reference type	Precision
\(\mathit{max}(d)\)	6.5 m	“ANALYTIQUE”	0.01%
\({d}_{p}\)	3.1m	“ANALYTIQUE”	0.01%
\({V}_{\mathit{rebond}}\)	-1.303840481m/s	“ANALYTIQUE”	0.01%

D modeling:

Identification	Precision
\({d}_{p}\)	No regression
\({V}_{\mathit{rebond}}\)	No regression