.. _V2.04.120:

**v2.04.120** SDLV120 - Absorption of a compression wave in an elastic bar
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**Summary**

We test the elastic paraxial elements of order 0 intended to apply absorbent conditions at the border of a finite element mesh to simulate infinity in direct transient calculations.

They are used to model an infinite elastic bar, in 3D or 2D, in which a pressure wave is created by imposing a displacement to one of the ends. We are interested in the non-reflection of the wave at the "infinite" end of the bar.

The two direct transient operators of*Code_Aster* are tested successively, namely DYNA_VIBRA and DYNA_NON_LINE.


.. toctree::
    :hidden:

    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Mod_lisation_B
    Synth_se_des_r_sultats