Abstract. This paper presents an approximate method to predict the natural frequencies of thin-walled cylinders. By taking inspiration from a previous work one authors, starting point proposed approach is proper construction reasonable eigenfunctions. However, new simple tool based on principle virtual has been developed estimate and amplitude vibration without complex numerical resolution. Mor...

Cylindrical shells made of composite material form one the major structural parts in aerospace structures. Many them are acoustically thick, which ring frequencies much higher than their critical frequencies. In this work, sound radiation behaviour thick cylinders is presented. Based on and acoustic wave number diagrams, modal average resistances frequency band interest theoretically determined...

in this paper, the deformation of a thick-walled circular cylindrical shell of incompressible isotropic elastic material is considered. the shell, which is made of three-term strain energy function is subjected to the combined external and axial loading pressure. in order to obtain the relevant eigenvalues, which is the main objective of the work, the incremental equilibrium equations are so...

Ensuring the strength, reliability and safety of structures requires studying issues ine-lastic deformation zones occurrence development which result from equilibrium accumula-tion damages. Material postcritical characterized by a decrease in stress level during growing deformations is one damages accumulation effects. Application theory basic provisions to carry out refined strength analysis w...