The study investigates the dynamic performance of three-layer cylindrical sandwich shells that contain a concrete core and two nanoclay composite face sheets through vibration testing. Advanced sandwich systems have become popular because their performance improvements stem from two factors, which include enhanced stiffness-to-weight ratios, better damping capabilities, and their ability to control dynamic instability. The first-order shear deformation theory provides the mechanical framework for sandwich shell construction because it accurately models transverse shear deformation in moderately thick shell designs. The Von Kármán strain–displacement relationship establishes geometric nonlinearity for large-amplitude deformations. Hamilton's principle provides a systematic method to derive governing nonlinear equations of motion and boundary conditions for three-layer shell systems. The structure experiences radial external excitation, which allows researchers to study forced vibration and nonlinear dynamic stability of the system. The suitable discretization method converts the nonlinear partial differential equations into a system of nonlinear ordinary differential equations. The Runge-Kutta time integration method delivers numerical solutions that researchers employ to study forced nonlinear wave propagation through different excitation parameters, geometric features, and nanoclay reinforcement. The research studies how cylindrical sandwich shells transmit linear wave motions to measure wave speed through their structural design. The research demonstrates that face sheets that include nanoclay material provide substantial advantages to the concrete-core cylindrical sandwich shell because these face sheets deliver enhanced dynamic stability and vibration control, together with superior wave transmission properties.
Jiumin et al. (2026) studied this question.