Nonlinear Dynamics, Volume 1. Proceedings of the 34th IMAC, A Conference and Exposition on Dynamics of Multiphysical Systems: From Active Materials to Vibroacoustics, 2016, the fi rst volume of ten from the Conference, brings together contributions to this important area of research and engineering. Th e collection presents early fi ndings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: ¿ Nonlinear Oscillations ¿ Nonlinear Modal Analysis ¿ Nonlinear System Identifi cation ¿ Nonlinear Modeling & Simulation ¿ Nonlinearity in Practice ¿ Nonlinearity in Multi-Physics Systems ¿ Nonlinear Modes and Modal Interactions