B modeling
==============


Characteristics of modeling
-----------------------------------


.. image:: images/Object_30.svg
    :width: 498
    :height: 168


.. _RefImage_Object_30.svg:


Characteristics of the mesh
----------------------------

Number of knots: 22

Number of meshes and type: 10 QUAD4


Tested sizes and results
------------------------------


.. csv-table::

    "**Identification**", "**Reference**", "**Aster**", "**% difference**"
    "Frequency mode 1", "64.476", "277.788", "331"
    "Frequency mode 2", "131.918", "131.918", "1111.225", "742."
    "Frequency mode 3", "198.734", "2500.930", "1.16E3"
    "Frequency mode 4", "265.383", "4449.073", "1.52E3"
    "Frequency mode 5", "331.963", "6960.324", "2.00E3"



notes
---------

In the results table, we reported the frequencies whose modes are identical to the reference modes.


* the effects of transverse shear are overlooked in modeling DKT,


* Code_Aster results are much higher than the reference results,


* appearance of a membrane mode between modes 2 and 3 and between modes 5 and 6 of reference.