Summary of results
======================


* To obtain a good precision of the results, it is first necessary to obtain a precise and perfectly orthogonal modal base (CALC_MODES):


.. csv-table::

    "", "by avoiding multiple modes (different stiffness on the unexcited degrees of freedom),"
    "", ""
    "", "by correctly calculating rigid body modes (prefer the option 'CENTRE' in CALC_MODES to the other options),"
    "", ""
    "", "by specifying the method 'JACOBI' (in the keyword factor SOLVEUR_MODAL) for a complete modal extraction."



* The accuracy of the results is good both for travel and for speeds and accelerations.

For the elastic response of the system (relative displacements :math:`{u}_{3}-{u}_{1}`), the numerical precision is slightly lower due to the numerical accumulation of errors on the absolute values.