But
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Produce a load that can be used in dynamic resolution operators DYNA_VIBRA and DYNA_NON_LINE in order to be able to take into account seismic loads at the borders of 2D or 3D ground domains. The charges created potentially come from two sources: either "plane wave" charges deduced from movements imposed at the lateral borders in the direction of propagation, or second member complements of the "nodal force" type imposed on the lateral borders in the directions transverse to the propagation.

The data on imposed movement or force fields can also come from two sources: either a file resulting from transitory evolutions resulting from an auxiliary calculation of a 2D ground column by DEFI_SOL_EQUI, or a results-type evolution calculated on an auxiliary model and projected onto the boundaries of the domain.

It takes into account the concomitant nature of these alternative choices:

- source of transitory data on movements or forces at borders: either a unit of transitional results obtained by DEFI_SOL_EQUI for the auxiliary calculation of the 2D ground column behind the keyword UNITE_TRAN_UNIT and in this case data consistent with DEFI_SOL_EQUI are entered; or a result of transitory evolutions at the borders of the basin calculated on a 2D or 3D auxiliary model entered behind the keyword RESU_INIT and consistent with the new syntax of CREA_RESU. In both cases, it is necessary to specify the type of load plane wave or force imposed by the keyword CHARGEMENT.