.. _U2.06.13: **u2.06.13** General tips for using the DYNA_NON_LINE operator ========================================================================= **Summary:** This document introduces the use of transient resolution methods (implicit or explicit) for the numerical simulation of nonlinear dynamic problems on a physical basis. The general reference operator for this type of calculation is called DYNA_NON_LINE and its correct use will be facilitated by compliance with a few rules of good practice described in this document. These usage tips cover: * the correct definition of the model in a dynamic sense (including the initial conditions and limits), * the definition of discretization including the choice of the time scheme ([:ref:`R5.05.05 `], and also see :ref:`u2.06.13-Bibliographie`), * the choice of amortization models, * some post-treatment tips. Given the great diversity of non-linear problems, the user will be able to very usefully complete your reading with other more specific references: * [:ref:`U2.06.03 `]: on amortization modeling, * [:ref:`U2.06.05 `]: for soil-structure interaction (linear and non-linear), * [:ref:`U2.06.09 `]: for single and multi-support in seismic calculation of equipment in particular, * [:ref:`U2.06.10 `]: on the specificities of studies such as civil engineering under seismic loading, * [:ref:`U2.06.11 `]: for the use of fluid-structure models coupled with DYNA_NON_LINE, * [:ref:`U2.04.07 `]: use of DYNA_NON_LINE to solve slowly evolving but highly non-linear problems that have difficulty converging with STAT_NON_LINE (see bibliography), * [:ref:`U2.07.04 `]: for the non-linear transient dynamics of a model partially reduced by dynamic condensation with DYNA_NON_LINE, * [:ref:`U2.06.32 `]: for modeling rotating machines. Reading the documentation [:ref:`U2.04.01 `], which gives advice on how to use the STAT_NON_LINE operator, is also highly recommended because here you will especially deepen the specificities related to dynamics. All the aspects common to STAT_NON_LINE and DYNA_NON_LINE and which are detailed in the documentation [:ref:`U2.04.01 `], such as the choice of parameters for the Newton algorithm, remain valid in dynamics and are therefore not included here. .. toctree:: :hidden: self .. toctree:: :maxdepth: 2 :numbered: Introduction Definition_du_probleme_dynamique_transitoire Discretisation_du_probleme_continu Sp_cificit_s_des_probl_mes_fluide-structure_coupl_s Optimisation_des_performances Conclusion Bibliographie