.. _V2.03.119:

**v2.03.119** SDLS119 - Support plate subject to Ricker acceleration (time-frequency method)
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**Summary:**

This non-regression test involves the treatment of the non-linear problem of detachment of a flexible plate modelled by shell finite elements and placed on contact springs. These springs support the self-weight of the plate and the compressions generated by the rotation and vertical movement of the plate. Detachments are taken into account and treated by penalization.

The stresses imposed in the form of horizontal drive acceleration are Ricker-type pulses. In this modeling, the dynamic problem is solved in a linear calculation loop where the complement of nodal forces due to the nonlinearity of the detachment is recalculated each time over the entire time range. We use either a harmonic calculation with a frequency evolution and time feedback by Fourier transform in the classical time-frequency method, or a transient calculation on a physical basis in a strictly temporal alternative method.

This test case makes it possible to test, on a strictly linear calculation, the operator REST_SPEC_TEMP back in time by Fourier transform inverse of all the harmonic evolution by comparing its result to the transitory evolution obtained directly by the transient calculation.

Modeling B performs an identical calculation on a modal basis. The calculation parameters are different (in particular the step and the calculation time band). This test case makes it possible to test option EXCIT_RESU in a transient calculation on a modal basis, and the projection option RESU_GENE of a dyna_transdan structure in PROJ_BASE.


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    self

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

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence___mod_lisation_A
    Solution_de_r_f_rence___mod_lisation_B
    V_rification_de_l_option_N_PUIS___mod_lisation_C
    R_f_rences_bibliographiques
    Mod_lisation_A
    Synth_se_des_r_sultats