.. _V2.02.147:

**v2.02.147** SDLL147 — Simple vertical beam mounted on a spring subject to an earthquake
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**Summary:**

This test contributes to the validation of *Code_Aster* seismic spectral analysis operator COMB_SISM_MODAL. This is a non-regression test case, relating to the Gupta method, which considers both a dynamic and a quasistatic contribution of natural modes in a frequency band to be defined beforehand.

The structure under consideration is a simple vertical beam mounted on a spring. The values tested are the displacements, absolute accelerations and nodal reactions in 4 knots.


.. toctree::
    :hidden:

    self

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

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Synth_se_des_r_sultats