1. But

This operator aims to simplify the implementation of the Laplace-Temps method by allowing non-linear calculations to be carried out with impedances produced by MISS3D.

The use of the Laplace‑Temps method (cf. [U2.06.05]) requires several operations:

1. the calculation of a base of interface modes necessary for the projection of the impedances obtained with the operator CALC_MISS (cf. [U7.03.12]);

2. the creation of a new model that assembles these impedance matrices, whether as part of a resolution based on a physical basis or with dynamic reduction techniques (cf. [U2.07.04]);

3. possibly the static-dynamic transition when a prestress state must be taken into account at the beginning of the transient calculation.

Depending on the input arguments, this command allows the operations mentioned above to be carried out, that is to say, it makes it possible to produce the concepts necessary to use the macro-command CALC_MISS [U7.03.12] or to exploit the results of this type of impedance calculation.