Themes Figure showing part of the newly collated landscape of nonlinear structural dynamics. Full details can be found in Phil. Trans. R. Soc. A 373:20140400 Theme 0: Coordination of the ENL project Theme 1 WP 1.1 Identification methods WP 1.2 and 1.3 Predictive models and validation Theme 2 WP 2.1: Statistical energy analysis for nonlinear systems WP 2.2: Random vibration with friction and impact Theme 3 WP 3.1: Theoretical framework for nonlinear modal analysis WP 3.2 and WP 3.3: Experimental testing methods Theme 4 WP 4.1 and 4.3: Normal forms and rotating structures WP 4.4 Non-smooth systems (impact and friction) Theme 5: Active control