Stochastic stability analysis of steel tubes with random initial imperfections
The buckling load variability of imperfect steel tubes is investigated. The imperfections are modeled as a non-homogeneous Gaussian stochastic field. Evolutionary power spectra are derived from experimental measurements. The imperfections can lead to a substantial reduction of the buckling load. The type of loading and the imperfections affect the failure modes of the tubes.
buckling load variability stochastic fields shell finite element evolutionary spectrum random imperfections