How-To Video: Perform a Linear Analysis with Modal Base in Code_Aster

In this video we see how to run a linear transient dynamic analysis of a building structure based on an acceleration ground-motion time-history, using a modal base of the structure; that is the mode shapes from a modal analysis. We see how to modify our file with respect to the standard dynamic analysis that uses a physical base. We show how to define the modal base, assign a classical damping matrix based on user-defined damping ratios for each mode, and restore back the results from the modal to the physical base, in order to extract the displacement time-histories in an external 'resu' file. Repository with example files: https://github.com/Jesusbill/code-aster-examples/tree/master/LDA-Modal-Example #tutorial #code_aster #dynamic