Influence of conical shells geometric characteristics on their dynamic stability

Stability of imperfect stiffened conical shells

Article history: Received 5 February 2008 Available online 12 August 2008 This work is dedicated to the memory of Professor Liviu Librescu

Influence of initial geometric imperfections on the stability of thick cylindrical shells under internal pressure

nonlinear dynamic analysis of shells (material and geometric).

in this paper we have discussed the main features of a finite clement program which we have developed for nonlinear dynamic analysis of plates and shells with material and geometric nonlinear behaviour. for this purpose, initially, the finite element model which we have used is briefly described. afterwards, the nonlinear viscoplastic material model in one-dimensional and multi-dimensional medi...

Stability analysis of dynamic thin shells

We analyze the stability of generic spherically symmetric thin shells to linearized perturbations around static solutions. We include the momentum flux term in the conservation identity, deduced from the “ADM” constraint and the Lanczos equations. Following the Ishak-Lake analysis, we deduce a master equation which dictates the stable equilibrium configurations. Considering the transparency con...

Research on the free vibrational characteristics of isotropic coupled conical-cylindrical shells

In engineering applications, especially in the field of modern military defence, the cylindrical shells, conical shells and coupled conical-cylindrical shells are basically simplified models of many types of weapons and equipment, such as aircraft, missiles, and submarines. The study of free vibrational characteristics of cylindrical shells is comprehensive. Initially, researchers1-5 investigat...