User's Guide for 'AMCYLAN': Computational Package for Asymptotic Multi-ModeAnalysis of (Im-)Perfect Cylindrical Shells

摘要

The computational package AMCYLAN consists of computational modules with which anasymptotic multi-mode analysis can be performed for (im-)perfect anisotropic cylindrical shells which may be stiffened in axial and/or circumferential direction. The stiffeners are taken into accounts as smeared stiffeners. The nonlinear Donnell-Mushtari-Vlasov or Sanders or Novozhilov type shell equations can be chosen for the analysis. The circumferential dependence is eliminated by Fourier decomposition. The resulting sets of ordinary differential equations are solved numerically using a finite difference formulation. Thus the specified boundary conditions can be enforced rigorously in the prebuckling, buckling and postbuckling problems. The prebuckling problem can be either membrane or nonlinear. Computational package AMCYLAN can take into account mode interaction of a number of buckling modes in the postbuckling problem as well as in the analysis of the imperfection sensitivity.