This first of three volumes includes papers from the second series of NODYCON, which was held virtually in February of 2021. The conference papers reflect a broad coverage of topics in nonlinear dynamics, ranging from traditional topics from established streams of research to those from relatively unexplored and emerging venues of research. These include

• Fluid-structure interactions


• Mechanical systems and structures


• Computational nonlinear dynamics


• Analytical techniques


• Bifurcation and dynamic instability


• Rotating systems


• Modal interactions and energy transfer


• Nonsmooth systems