Complex dynamics of a nonlinear aerospace structure: numerical continuation and normal modes

Ludovic Renson (1) , Jean-Philippe Noël (1) , Gaëtan Kerschen (1)

1 (S3L) - Space Structures and Systems Laboratory

This paper investigates the dynamics of a real-life aerospace structure possessing a strongly nonlinear component with multiple mechanical stops. A full-scale finite element model is built for gaining additional insight into the nonlinear dynamics that was observed experimentally, but also for uncovering additional nonlinear phenomena, such as quasi-periodic regimes of motion. Forced/unforced, damped/ undamped numerical simulations are carried out using advanced techniques and theoretical concepts such as numerical continuation and nonlinear normal modes.

Mots clés: aerospace structure; piecewise-linear nonlinearities; normal modes; numerical continuation; modal interactions

Domaines: Mécanique des solides [physics.class-ph]; Mécanique des structures [physics.class-ph]; Vibrations [physics.class-ph]; Génie mécanique [physics.class-ph]; Dynamique, vibrations; Structures

Ludovic Renson, Jean-Philippe Noël, Gaëtan Kerschen. Complex dynamics of a nonlinear aerospace structure: numerical continuation and normal modes. Nonlinear Dynamics, 2015, 79 (2), pp.1293-1309. ⟨10.1007/s11071-014-1743-0⟩. ⟨hal-01635221⟩