Seminar Details
2007-10-30 (14.00) : "Nonlinear modal analysis of structural systems"
At Euler building
Organized by Mathematical Engineering
Speaker :
Gaëten KERSCHEN
( ULg )
Abstract :
The concept of nonlinear normal modes (NNMs) is discussed in this presentation.
The fundamental properties of NNMs are first described and illustrated using simple examples.
Their usefulness for modal analysis of nonlinear vibrating structures is the discussed.
Because there is virtually no application of the NNMs to large-scale engineering structures, several aspects
that might drive their development in the future are also highlighted. Specifically, we support that (i) numerical
methods for the continuation of periodic solutions pave the way for an effective and practical
computation of NNMs, and (ii) time-frequency analysis is particularly suitable for the analysis of the resulting dynamics.