4. Using modal expansion (EXPANSION)#
The method of using this option is not very relevant, it is especially useful for validation. It is preferable, if you want to perform a modal expansion, to use the MACRO_EXPANS command directly, or the PROJ_MESU_MODAL, REST_GENE_PHYS and PROJ_CHAMP chain.
4.1. Keywords MESURE and NUME_MODE_MESURE#
♦ MESURE = measure,
An sd_result concept of the mode_meca or dyna_harmo type that contains the modes to be extended on the numerical model.
♦ NUME_MODE_MESURE = L_I,
Allows you to select the order numbers of the modes you want to extend.
4.2. Keyword CALCUL#
♦ CALCUL = calculation,
SD_result concept of the mode_meca type that will be the basis for expansion. The choice of the expansion base is important for the quality of results.
♦ NUME_MODE_CALCUL = L_I,
Allows you to select the order numbers of the modes you want to use in the expansion base. It is more interesting to keep only the modes that « resemble » the deformations to be extended, the similarity criterion being obtained by calculating MAC.