Numerical and Experimental Dynamic Analyses of a Postbuckled Box Beam

This paper proposes a numerical approach to estimate the dynamic behavior of a typical aeronautical aluminum box-beam structure liable to buckling. The methodology is based on a nonlinear finite element model and an experimental modal analysis procedure. The finite element model deals with the coupled nonlinear static and dynamic problems in two steps: 1) determining the static equilibrium considering geometrical nonlinearities, and 2) solving...