But
===

Calculate the dynamic evolution of a structure whose material or geometry has a non-linear or contact/friction behavior. The syntax for this command is very similar to that of the STAT_NON_LINE operator [:external:ref:`U4.51.03 <U4.51.03>`].

Dynamic evolution is studied based on an initial state, reference configuration, which can be produced by a quasi-static analysis (operator STAT_NON_LINE [:external:ref:`U4.51.03 <U4.51.03>`]) or previous dynamics (operator DYNA_NON_LINE).

Dynamic evolution can be studied in several successive studies, by continuing from an already calculated moment, if a database has been defined in the user's study profile.

Produces an evol_noli concept.