.. _V8.01.113:

**v8.01.113** FDLV113 - Pressure source in a ball full of fluid interacting with soil - fluid - structure
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**Summary:**

This test contributes to the validation of *Code_Aster* - MISS3D chaining by the frequency coupling method in soil-fluid-structure interaction (ISFS).

This test makes it possible to consider all types of interfaces: soil-structure, fluid-structure, soil-fluid, free soil. It also makes it possible to test the loading by source of point pressure in the fluid.

It represents a ball, a hollow sphere of finite dimensions, filled with water.

To have all interface types, the lower half of the hollow sphere is modeled by *Code_Aster* as the "structure" domain; the upper half representing the "ground" domain with the same characteristics as the structure and the "fluid" domain is modeled by MISS3D. A source of harmonic pressure, with a constant unit modulus for each frequency between :math:`1\mathrm{Hz}` and :math:`30\mathrm{Hz}`, is imposed at the center of the ball in the fluid medium.

The modulus of the radial displacements obtained outside and inside the ball is tested with respect to a calculated analytical solution. The agreement is correct provided that the effect of a parasitic resonance corresponding to the first natural frequency of the sphere with mass of water added to the center is suppressed. This is possible by introducing a RFIC parameter in MISS3D.


.. 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