v5.01.125 SDND125 — Treatment of localized nonlinear behaviors with DYNA_VIBRA

Summary:

In the context of the modernization of the architecture of the data structure used for the calculation of transient response on the modal basis of a model equipped with localized non-linearities (operator DYNA_VIBRA), the implementation of non-linear behavior data has been streamlined and a number of facilities have been provided for the post-processing stage.

Thus, through a discrete system (mass-spring), the main objective of this test case is to expose the new data entry of various localized non-linear behaviors available in the operator DYNA_VIBRA, via the operand COMPORTEMENT and the keyword RELATION. The localized relationship between masses is used to model the following phenomena or devices in dynamics:

• Modeling A: Front impact via RELATION = “DIS_CHOC”

• Modeling B: Device representing linear buckling via RELATION = “FLAMBAGE”

• Modeling C: Anti-seismic device via RELATION = “ANTI_SISM”

• D modeling: Device representing non-linear viscoelastic behavior via RELATION = “DIS_VISC”

• E modeling: Device representing non-linear behavior via RELATION = “DIS_ECRO_TRAC”

• F modeling: Device representing a force-displacement or moment-rotation relationship via RELATION = “RELA_EFFO_DEPL”

• G modeling: Device representing a force-speed relationship via RELATION = “RELA_EFFO_VITE”

It is therefore a non-regression test case. Only calculation values have been recorded to check consistency between different code_aster versions.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Boundary conditions and loads
  • 1.3. Initial conditions
• 2. Modeling
  • 2.1. Characteristics of the mesh
  • 2.2. Characteristics of modeling
  • 2.3. Modeling parameters
• 3. Modeling results
• 4. Summary of results