Spectral Submanifolds and Exact Model Reduction for Nonlinear Beam Dynamics

CDSNS Colloquium
Friday, January 13, 2017 - 11:00am
1 hour (actually 50 minutes)
Skiles 005
ETH (Zurich)
We use  invariant manifold results on Banach spaces to conclude the existence of spectral submanifolds (SSMs) in a class of nonlinear, externally forced beam oscillations . Reduction of  the governing PDE  to the SSM provides an exact low-dimensional model which we compute explicitly. This model captures the correct asymptotics of the full, infinite-dimensional dynamics.  Our approach is general enough to admit extensions to other types of  continuum vibrations. The model-reduction procedure we employ also gives guidelines for a mathematically self-consistent modeling of damping in PDEs describing structural vibrations.